Zika is spread to people primarily through the bite of an infected mosquito but can also be transmitted from mother to child during pregnancy or from person to person through sexual contact or blood transfusion. The disease can cause symptoms that include fever, rash, conjunctivitis (“pink eye” where the eyes appear red or pink), and joint and muscle pain. Although most people with Zika have only mild symptoms or none at all, Zika in pregnant women has been linked to adverse pregnancy outcomes, such as miscarriage and stillbirth, and severe birth defects. Zika can be passed to the fetus and cause a birth defect of the brain called microcephaly and other severe brain defects, according to CDC. Zika is also linked to other problems such as Guillain-Barré syndrome, an uncommon condition of the nervous system. Although at present no vaccine has been approved by the U.S. Food and Drug Administration to prevent Zika, several vaccines are in different phases of development. Zika was first identified in the Zika Forest in Uganda in 1947 and caused only sporadic human disease until 2007. In 2007, Zika was detected in Yap State, Federated States of Micronesia, and subsequent outbreaks occurred in Southeast Asia and the Western Pacific. In 2014, Zika spread east across the Pacific Ocean to French Polynesia, then to Easter Island. In May 2015, Brazil documented the first case of locally acquired Zika transmission in the Americas. See figure 1 for a timeline of the Zika outbreak and the U.S. Zika response overseas. According to WHO, in November 2015, Suriname, El Salvador, Guatemala, Mexico, Paraguay, and Venezuela reported cases of locally acquired Zika, followed by Panama, Honduras, French Guiana, Martinique, and Puerto Rico in December 2015. Zika continued to spread throughout the region, and on February 1, 2016, WHO declared that the recent association of Zika with clusters of microcephaly and other neurological disorders constituted a public health emergency of international concern. In November 2016, WHO declared an end of the public health emergency of international concern regarding microcephaly, other neurological disorders, and Zika. However, WHO announced that Zika and the associated health outcomes remained a significant public health challenge requiring intense action. Zika spread to multiple countries throughout the globe but primarily affected countries in Latin America and the Caribbean region. According to WHO, as of March 2017, transmission of the Zika virus was occurring in 79 countries or territories, most of which are located in the Western Hemisphere. According to WHO, from 2015 to 2017, there were approximately 583,000 suspected and 223,000 confirmed cases of Zika virus transmission in the Western Hemisphere. See figure 2 for the cumulative Zika incidence rates in each country in Latin America and the Caribbean from 2015 to 2017. In February 2016, the President submitted a request to Congress for emergency funding to enhance ongoing U.S. efforts to prepare for and respond to Zika, including a request for funding for USAID and State to respond to the outbreak overseas. In addition, in April 2016, USAID and State notified Congress of their intent to repurpose $215 million of fiscal year 2015 supplemental Economic Support Fund Ebola funding for the U.S. Zika response overseas, which included $78 million for CDC international Zika activities. In September 2016, Congress appropriated about $175.1 million in supplemental funding to USAID and State in the Zika Response and Preparedness Appropriations Act, 2016, for the U.S. Zika response overseas. USAID activities initially began in five countries—Haiti, Honduras, Guatemala, El Salvador, and Dominican Republic—based on an assessment of their Zika risk and limited host government capacity to prevent the spread and respond to the impact of the virus. USAID ultimately supported activities in 26 countries in the Latin America and Caribbean region. As of September 30, 2018, USAID and State had obligated about $385 million (99 percent) of the total $390 million available for the U.S. Zika response overseas and had disbursed approximately $264 million (68 percent). Specifically, USAID had obligated all of its funds available for the Zika response and disbursed about two-thirds, and State had obligated and disbursed more than three-quarters of its funding for Zika. USAID and State had disbursed a higher proportion of the repurposed Ebola funds than the funds appropriated in the Zika Response and Preparedness Appropriations Act, 2016. See figure 3 for USAID and State Zika response funding appropriations, obligations, and disbursements as of September 30, 2018. Of the $215 million in repurposed Ebola funds, USAID and State had obligated $215 million (100 percent) and had disbursed almost $201 million (93 percent) as of September 30, 2018. Of the approximately $175 million appropriated in the Zika Response and Preparedness Appropriations Act, 2016, USAID and State had obligated about $170 million (about 97 percent) and had disbursed about $63 million (36 percent) as of September 30, 2018. As of September 30, 2018, USAID had obligated all funds available for the Zika response and had disbursed about two-thirds, from three accounts. USAID has two sources of funding for Zika response activities: $211 million of fiscal year 2015 supplemental Economic Support Fund Ebola funding repurposed for the Zika response and about $155.5 million provided in the Zika Response and Preparedness Appropriations Act, 2016—including $145.5 million and $10.0 million through the Global Health Programs and Operating Expenses accounts, respectively—for a total of $366.5 million. As of September 30, 2018, USAID had obligated approximately $366.5 million (100 percent) and had disbursed approximately $245 million (67 percent), from the Economic Support Fund, Global Health Programs, and Operating Expenses appropriations accounts. See figure 4 for USAID Zika response funding obligations and disbursements by account. USAID obligated all funding for Zika response activities within a year after it was repurposed or appropriated. As of September 30, 2018, USAID had disbursed a higher proportion of repurposed fiscal year 2015 supplemental Economic Support Fund Ebola funding (93 percent) compared with Global Health Programs and Operating Expenses funding (28 percent and 72 percent, respectively), which was appropriated in the Zika Response and Preparedness Appropriations Act, 2016, in September 2016. The $211 million in Economic Support Fund obligations supported 56 USAID activities, as well as a $78 million interagency transfer to CDC. The $145.5 million in Global Health Programs obligations supported 25 activities and program support. Obligations for USAID-supported activities ranged from $12,000 to $37 million and included support for activities such as the procurement of insect repellent to assist pregnant women in avoiding Zika infection and strengthening the ability of civil society and community networks to disseminate information related to Zika. CDC supported 25 activities that ranged from $276,000 to $13.6 million, including activities such as collecting and analyzing public health data, conducting epidemiological studies to better understand the prevalence of Zika and related risk factors, building laboratory capacity, and providing training to conduct Zika virus testing. As of September 30, 2018, State had obligated and disbursed more than three-quarters of funding available for the Zika response, from two accounts. State has two sources of funding for Zika response activities: $4 million from a fiscal year 2015 supplemental Economic Support Fund appropriation for the Ebola response that was repurposed for the Zika response and about $19.6 million provided in the Zika Response and Preparedness Appropriations Act, 2016, the majority of which was provided through the Diplomatic and Consular Programs account, for a total of about $23.6 million. As of September 30, 2018, State had obligated and disbursed about $18.3 million (almost 78 percent) from the Economic Support Fund and Diplomatic and Consular Programs accounts. See figure 5 for State Zika response funding obligations and disbursements by account. Under the Zika Response and Preparedness Appropriations Act, 2016, State was provided almost $14.6 million through the Diplomatic and Consular Programs account, $4 million through the Emergencies in Diplomatic and Consular Services account, and $1 million through the Repatriation Loans Program account, for a total of almost $19.6 million. In September 2017, State notified Congress of its intent to transfer the $4 million from the Emergencies in Diplomatic and Consular Services account and $870,000 from the Repatriation Loans Program account to the Diplomatic and Consular Programs account. These transfers resulted in a total of $19.5 million available under the Diplomatic and Consular Programs account and $130,000 under the Repatriation Loans Program account. The $4 million in Economic Support Fund obligations supported research and development activities by the International Atomic Energy Agency to control disease-carrying mosquito populations. The $14.3 million in Diplomatic and Consular Programs obligations supported activities including medical evacuations to protect the health of pregnant U.S. government personnel and eligible family members, mosquito abatement training and other measures to reduce Zika risk to overseas staff, as well as public diplomacy efforts to further inform journalists and the public about the U.S. response to Zika. In their reporting to Congress on the uses of Zika funds, USAID and State included some country information but did not track or provide information on funding uses broken down on a country basis. In October 2016, USAID and State submitted a consolidated report to the appropriations committees on the anticipated uses of funds made available to USAID and State by the Zika Response and Preparedness Appropriations Act, 2016, in response to a reporting requirement in Section 203 of the act. After the initial submission, the act required the agencies to update and submit the report to the committees on appropriations every 60 days until September 30, 2017. The initial report described ongoing Zika response activities in five countries as well as planned activities in additional countries. Subsequent reports listed specific countries where USAID and State supported Zika response activities. However, USAID and State did not provide information to Congress on the uses of funding appropriated by the Zika Response and Preparedness Appropriations Act, 2016, broken down by country. The reports also included obligation and disbursement information for the fiscal year 2015 supplemental Economic Support Fund Ebola funding that was repurposed for the international Zika response; however, similar to the information provided regarding the funds appropriated by the Zika Response and Preparedness Appropriations Act, 2016, the reports’ information on the use of the repurposed Ebola funds was also not broken down by country. USAID officials told us that Zika activities were designed to be implemented on a regional and multicountry basis. While over 95 percent of all U.S. government funds available for the Zika response overseas were obligated by USAID, and the agency had a number of financial tracking systems in place, the agency did not take steps to record its funding by country at the outset of Zika response programming. Specifically, USAID officials noted that the contracts and grants the agency had signed with its implementing partners did not include provisions requiring partners to provide information to USAID that broke down their use of funds by country. Consequently, USAID was unable to track the uses of Zika funds on a country basis. Federal internal control standards state that management should use and communicate the necessary quality information both internally and externally to achieve the entity’s objectives and address related risks. According to USAID officials, tracking information on the uses of Zika response funding broken down by country would be helpful in the future for mission directors, chiefs of missions, and partner-country ministries of health, some of whom have requested this information. Moreover, data on USAID funding to address future infectious disease outbreaks if broken down by uses in each country could provide additional useful information to decision makers in assessing risks and planning responses. The ability to compile funding by country when responding to future infectious disease outbreaks would enable USAID to provide key decision makers, including Congress and agency officials, with additional information to better support spending oversight and inform budgetary and planning decisions. As part of the U.S. Zika response overseas, USAID provided assistance to several countries in the Caribbean, Central America, and South America and conducted a variety of activities related to mosquito control, public awareness, capacity building, and research. In support of mosquito control, USAID’s Zika AIRS Project (ZAP) conducted activities that included Entomological monitoring: collecting and reporting information on the location and population of mosquitoes; Larviciding: placing agents that kill mosquito eggs in likely breeding sites, such as water receptacles; Source reduction interventions: facilitating the removal or mitigation of likely breeding sites, such as tires, pots, barrels, or anything that may allow for standing water; and Indoor residual spraying: spraying insecticide that has a lasting effect in houses. We observed mosquito control activities during our fieldwork. For example, in Honduras we followed a team as they went house to house to implement and facilitate mosquito control activities. They collected information from mosquito egg traps, which serve as indicator of breeding activity, and recorded it for monitoring purposes. They also examined the premises for potential mosquito breeding sites, treated susceptible areas such as wash basins with larvicide, and spoke with residents about picking up trash and covering outdoor plant pots to reduce potential breeding sites. To support raising public awareness of the risk of Zika virus and to promote behavior change to reduce the spread of the disease, USAID implementing partners such as the Red Cross and CARE told us that they collaborated with communities, local government, and schools to communicate information about Zika. For example, in Trinidad, the Red Cross conducted educational campaigns at schools to improve students’ awareness. During our fieldwork, we observed a session led by adult volunteers during which children played games and engaged in discussions designed to teach Zika prevention and response methods. Implementing partners told us that the impact of such efforts extends beyond those reached directly; for example, they said the children who learned about Zika risks and prevention also conveyed the knowledge to their families, who in turn may pass it on to friends or others in the community. In Peru, CARE worked with schools to develop written education guides for application in the classroom and conducted communication campaigns. During our fieldwork, we went to schools and observed students delivering oral presentations on Zika risks and prevention. In addition, we witnessed other student activities, such as classroom discussions and art projects focused on Zika, designed to demonstrate understanding, raise awareness, and promote behavior change. To support capacity building, the Applying Science to Strengthen and Improve Systems (ASSIST) activity, which USAID funding supported, focused on improving Zika-related health services. Specific efforts included conducting a baseline assessment of the quality of care, improving clinical guidelines, training health care providers, and implementing a quality improvement program. During our fieldwork in Honduras, we visited a hospital and met with ASSIST-supported health workers who told us that they applied new guidance in their practice, and as a result, improved care in areas including counseling, screening, diagnosis, and follow-up of those affected by Zika. We also visited a hospital in Dominican Republic, where health care workers stated that they collaborated with ASSIST in responding to Zika by training staff and producing guidance materials. These activities raised awareness, increased prevention efforts, and improved care, according to health care workers. USAID supported research, training, and innovation activities through its “Grand Challenge” program as well as its interagency agreement with CDC. USAID launched a series of Grand Challenge efforts, providing $30 million in grants to foster innovation on new methods and technologies to respond to Zika. One grant, for example, supported the World Mosquito Program’s research into the feasibility and effectiveness of infecting mosquitoes with bacteria to hinder transmission of the Zika virus. We visited the program’s operations in Colombia, met with scientists, and observed the breeding lab. Program scientists told us that initial efforts have been promising and that if more tests prove successful, the potential for reducing Zika transmission could be significant. Another USAID Grand Challenge grant supports research into the possible use of genetically modified yeast to prevent mosquito eggs from hatching. We spoke with scientists, lab technicians, and viewed facilities supported by this grant in Trinidad during our field work. Scientists stated that yeast attracts mosquitoes and is inexpensive, commonly available, and environmentally friendly. Testing is ongoing, but if successful, the approach could help reduce populations of mosquitoes in critical areas, according to the scientists. The USAID–CDC interagency agreement identifies a range of activities that involve technical assistance to help strengthen surveillance, emergency operations and management, and epidemiological investigations and research. One CDC activity, for example, focuses on supporting public health surveillance and epidemiological studies to better understand the prevalence and risk factors for severe health outcomes related to Zika. Another activity aims to build laboratory capacity in areas such as Zika diagnostic test production and distribution. In addition, the objectives of CDC’s Field Epidemiology Training Program are to train qualified professionals, build sustainable capacity for detecting and responding to health threats, and develop in-country expertise so that disease outbreaks can be detected locally and prevented from spreading. In Dominican Republic, CDC officials told us that this program delivers 3 months of classroom and field project training, and that as of August 2018, four cohorts of approximately 80 students each had completed the training. CDC officials told us that in addition to implementing various activities, CDC’s Central America Regional Office in Guatemala played an important role in facilitating U.S. government cooperation with Colombia, which had the second largest outbreak of Zika after Brazil. We reviewed status reports for six USAID activities that received among the highest amounts of funding, and each identified various results. Below, we describe the activities and examples of reported results. For more information, see appendix II. ASSIST: This activity sought to strengthen Zika-related health services and systems in Latin America and the Caribbean with a focus on pregnant women, newborns, and women of reproductive age. ASSIST reported that it conducted virtual and in-person training, courses, and workshops on Zika prevention, diagnosis, and care. ASSIST also reported that 8,133 health care workers had been trained as of March 2017, and that its efforts had supported the development of Zika care protocols and guidelines with a new emphasis on clinical care and support for affected infants and families. ASSIST further reported that through March 2018, 75 percent of children affected by Zika in Dominican Republic received specialized care at Hospital Infantil Robert Reid Cabral, an ASSIST- supported hospital in the capital, Santo Domingo. Red Cross: This activity aimed to reduce risks associated with Zika infection through community involvement, sharing lessons learned, and improving practices. The Red Cross reported that its communication efforts reached approximately 3,000 students, 29 communities, and almost 140,000 people via TV, radio, and social media engagement, providing them with information on risk and protection methods. Zika AIRS Project (ZAP): This is a mosquito control activity focused on reducing Zika transmission in Latin America and the Caribbean. Specific activities supported by USAID funding included entomological monitoring, larviciding, source reduction interventions, and indoor residual spraying. ZAP reported that five countries (El Salvador, Guatemala, Haiti, Honduras, and Jamaica) implemented comprehensive mosquito control activities. Population Services International: The purpose of this activity was to improve the capacity and raise awareness of people in countries affected by and at risk of Zika and other vector-borne diseases. Population Services International reported that through March 2018, 35 health providers in Dominican Republic, El Salvador, and Guatemala had been trained in raising awareness about Zika prevention and the use of printed educational materials. In addition, 1,006 pregnant women received counseling on Zika prevention, and 967 received prevention kits containing condoms, mosquito repellent, and printed educational materials. Additionally, 227 pharmacy attendants from 195 pharmacies received information on Zika prevention. Save the Children’s Community Action on Zika (CAZ): The goal of this project was to reduce Zika transmission and minimize the risk of Zika-related microcephaly and other neurological disorders. The project focused on helping the most vulnerable through community- based prevention strategies in Colombia, Dominican Republic, and three Central American countries. CAZ reported that it had reached approximately 65,000 students and trained 3,838 community agents and volunteers who supported efforts to strengthen the capacity to prevent Zika in 921 communities. United Nations Children’s Fund (UNICEF): This activity focused primarily on four countries: Guatemala, El Salvador, Honduras, and Dominican Republic. UNICEF worked to promote the adoption of prevention behaviors among at-risk populations through actions to raise awareness at multiple levels: individual, interpersonal, community, institutional, and national policy levels. UNICEF reported that these efforts reached more than 5.5 million people with key risk- communication messages and more than 150,000 people through coordinated social mobilization and person-to-person communication. For example, in Guatemala, UNICEF worked with a local partner to train young people and adolescents in schools and social groups to lead prevention activities in their communities. Moreover, around 25,000 pregnant women benefited from counseling sessions on Zika- prevention behaviors. In response to Zika, State conducted public awareness and communication initiatives, medical evacuations for overseas staff, and other activities. According to a State official, State conducted Zika-related public outreach to U.S. citizens abroad through social media and the Smart Traveler Enrollment Program, a service that provides information from U.S. embassies about local safety conditions. According to a State official, State also implemented public diplomacy activities related to Zika awareness and communication. For example, one activity aimed to raise awareness of vector-borne diseases such as Zika and collect information on insect breeding grounds. Another supported the addition of a science envoy who focused specifically on Zika and mosquito-borne diseases. In addition, according to a State official, State conducted Zika-related medical evacuations as part of those normally offered to female staff who became pregnant while serving abroad. State’s medical services division also supported overseas posts by purchasing and distributing mosquito repellent. State officials also told us that they coordinated Zika response efforts internally and externally. For example, State participated in a U.S. government interagency group led by CDC to exchange information on Zika and coordinated with other agencies on the response effort. Over the course of our fieldwork, USAID and implementing partner officials identified two key challenges to the implementation of Zika response activities. The first was the long-term sustainability of Zika response activities. The second was the timely implementation of Zika response activities in countries without bilateral USAID health programs. While USAID took steps to address the challenge related to sustainability, it only partially mitigated the challenge to timely implementation of Zika response activities in countries without bilateral USAID health programs. Agency and implementing partner officials identified the sustainability of Zika response efforts as a key challenge. While USAID did not intend to continue U.S. Zika response activities after the one-time emergency funding, sustainability was a consideration and posed a challenge due to the short implementation time frame, according to agency and implementing partner officials. One official further elaborated that Zika funding efforts occurred during the acute phase of the outbreak, which made it difficult to focus on long-term needs. For example, an implementing partner said that Zika-affected children require long-term care that host country governments may not be able to support after U.S. assistance ends. In addition, host country government officials, U.S. government officials, and implementing partners said that some Zika activities may not be sustainable after U.S. assistance is finished due to a lack of funds and limited capacity to continue the work. To address this challenge and support the long-term continuation of Zika response activities, implementing partners aligned their activities with those of host country governments and other organizations. Implementing partners reported working with governments and other organizations to incorporate Zika activities into their plans and practices so they could continue over the long term. One implementing partner and the Dominican Republic’s Ministry of Health, for example, planned mosquito control efforts together, and a Ministry of Health official said they intend to continue those control efforts after the end of Zika funding. Implementing partners in various countries also stated that Zika activities brought broader benefits to mosquito control, disability services, maternal health care, surveillance efforts, and emergency preparedness, which facilitated partners’ efforts to align their Zika response activities. For example, an implementing partner reported using Zika funding to develop organizational guidelines for treating Zika-affected children, which will be used by the health care system in Dominican Republic to treat children with related disabilities in the long term. According to some implementing partners in countries we visited, they developed Zika protocols and guidelines in response to new scientific information, trained government and other personnel on the protocols, and worked with officials of host country governments and other organizations to encourage adoption of Zika activities. For example, according to an agency official, an implementing partner in Peru developed a curriculum for epidemiologists and trained them on how to detect and contain mosquito-borne diseases, such as Zika. The agency official said that the implementing partner shared the training curriculum and materials with Peru’s Ministry of Health so it could continue the trainings after the end of Zika funding. According to implementing partners, they also involved local communities in activities to increase community ownership and address sustainability. For example, an implementing partner official said they trained a cadre of community volunteers in Guatemala and El Salvador on behavior change practices so that they can continue activities after the end of Zika funding. In addition, implementing partner officials said that engaging with communities to learn about needs and resources is important to continued community interest in activities. For example, an implementing partner that works with communities on health priorities developed an approach that includes a toolkit for identifying a community’s specific risks for Zika and the efforts best suited to helping the community eradicate mosquito breeding sites. In places affected by violence, some implementing partners engaged with communities to better understand how to prioritize community worker and volunteer safety to enable the continuation of activities. For example, an implementing partner in Guatemala engaged with local communities to understand areas they recommended health workers avoid due to safety concerns. Agency and implementing partner officials described timely implementation of activities in some countries without bilateral USAID health programs as a second key challenge. Twenty-two out of the 26 countries where USAID implemented its Zika response activities were countries without bilateral USAID health programs. USAID officials stated that, as a result, there were no USAID health program officials present in these countries to build on relationships with host country health officials and help facilitate the start of implementing partners’ activities during the Zika response. USAID officials noted two reasons that working with host country governments took time. First, some U.S. Zika response activities started after a decline in Zika cases, when some host country governments were no longer as focused on countering the disease. Implementing partners responded to this situation by identifying related health service improvements that could stem from implementing a Zika response and were of interest to the host country governments. Second, agency and implementing partner officials said that in some countries without bilateral USAID health programs it also took time to identify the appropriate points of contact and establish relationships—preliminary steps needed to obtain approval from the host country government before activities could get underway. According to USAID officials, these relationships are critical to navigating bureaucratic systems and assist in designing activities that meet the needs of host country governments and communities, which are needed for timely implementation. USAID took some steps to address the timely implementation challenge in countries without bilateral health programs. For example, according to USAID officials, USAID worked with multilateral partners that had a health presence in those countries and relied on regional field-based Zika coordinators to build relationships with in-country points of contact. As noted above, however, agency officials indicated that Zika response activities took additional time to deploy in some of the countries without bilateral USAID health programs. Further, implementing partners reported it took additional time to start up activities in those countries because of the time it took to obtain approval for them from the ministries of health. For example, one implementing partner reported that activity startup was postponed for nearly 3 months until it received approval from the host country government. Another implementing partner said it was a challenge to get information on Zika from the host country government or establish dialogue until USAID officials became involved. USAID officials also said that efforts to start and integrate Zika response activities in countries with ongoing USAID health programs did not face a number of the obstacles to timely implementation experienced in countries without bilateral USAID health programs. According to federal internal control standards, agencies should design control activities, such as a plan, to achieve their objectives and address related risks, such as the challenge related to timely implementation. In an effort to enhance its planning for outbreaks, USAID developed an infectious disease response plan in July 2018 during the time frame of our review. However, the plan does not provide specific guidance on how to address the challenge of initiating emergency response activities in countries without bilateral USAID health programs, such as by noting particular practices that implementing partners and other officials can use to address that challenge. For example, our fieldwork and interviews with USAID officials indicate that the following may be helpful practices for infectious disease response: Immediately establish an in-country working group that includes implementing partners, host country government officials, and U.S. government officials to help initiate and coordinate outbreak response. Communicate a current list of health ministry and other relevant government officials to implementing partners and other officials so they can quickly identify the appropriate points of contact. According to USAID officials, USAID missions maintain regular contact with host country governments, maintain contact lists, and participate in coordination meetings. However, in the case of overseas Zika response, some implementing partner officials in the field told us that they did not initially know who to contact in the host country government. Likewise, a host country government official told us that a working group on Zika outbreak response was not established until after officials recognized that implementing partner and host country government officials did not have regular channels of communication. By taking steps to improve planning for countries without bilateral USAID health programs—such as by adding specific guidance for initiating emergency response activities in such countries to its July 2018 plan—USAID would be better positioned to quickly build relationships with health ministry and other key government officials in host countries and thus be better able to provide a timely infectious disease response to future outbreaks. The Zika virus quickly spread to dozens of countries in 2015 and 2016, prompting WHO to declare the virus and associated health risks an international public health emergency. As future infectious disease outbreaks arise, Congress will be called on to fund overseas response efforts, as it did with the Zika outbreak, and USAID is likely once again to play a vital role in those efforts. Because USAID did not provide key decision makers with information on how Zika funding was distributed across the various countries where it conducted response activities, decision makers lack visibility into a key aspect of the overall U.S. Zika response overseas. The ability to compile this information by country when responding to future infectious disease outbreaks would enable USAID to provide key decision makers, including Congress and agency officials, with additional information to better support spending oversight and inform budgetary and planning decisions. Further, while USAID took steps to address the challenge of sustaining Zika response activities over the long term, it did not fully mitigate the challenge of timely implementation of activities in countries without bilateral USAID health programs. As a result, the agency’s response to Zika took additional time in some countries without bilateral USAID health programs. Infectious disease response planning that addresses countries without bilateral USAID health programs would better position USAID to quickly respond to infectious disease outbreaks, such as Zika, whenever the need arises. We are making the following two recommendations to USAID: The Administrator of USAID should take steps to ensure that, in responding to future public health emergencies of international concern, the agency is able to compile funding information broken down by country. (Recommendation 1) The Administrator of USAID should take steps to improve its infectious disease response planning to address the challenge of initiating response activities in countries without bilateral USAID health programs in a timely manner. (Recommendation 2) We provided a draft of this report to USAID, State, and CDC for review and comment. USAID provided written comments, which we have reproduced in appendix III. In its comments, USAID agreed with our findings and recommendations and identified a number of actions it plans to take in response. Specifically, USAID stated that in responding to future public health emergencies of international concern, it plans to compile and report on funding by country. USAID also outlined the steps it plans to take to develop additional guidance for USAID officials in countries without bilateral health programs. State and CDC did not provide formal responses. CDC provided technical comments, which we incorporated throughout the report, as appropriate. We are sending copies of this report to the appropriate congressional committees, the Administrator of USAID, the Secretaries of State and of Health and Human Services, and to other interested parties. In addition, the report is available at no charge on the GAO website at http://www.gao.gov If you or your staff have any questions about this report, please contact me at (202) 512-3149 or gootnickd@gao.gov. Contact points for our Offices of Congressional Relations and Public Affairs may be found on the last page of this report. GAO staff who made key contributions to this report are listed in appendix IV. The Zika Response and Preparedness Appropriations Act, 2016, included a provision for us to review the status of U.S. Agency for International Development (USAID) and Department of State (State) actions to respond to Zika. In this report, we examine (1) the status of USAID and State funding for the U.S. Zika response overseas, (2) activities supported by these funds, and (3) challenges, if any, to implementing Zika response activities and actions taken to address any challenges. To examine the status of funding for U.S. Zika response overseas, we reviewed USAID and State’s reports to the Senate and House Committees on Appropriations mandated by Section 203 of the Zika Response and Preparedness Appropriations Act, 2016. We reviewed agency reporting submitted to Congress and discussed the reports with agency officials. We also reviewed USAID and State’s reports to the Senate and House Committees on Appropriations mandated by the Department of State, Foreign Operations, and Related Programs Appropriations Act, 2015. We obtained additional funding and activity information from USAID covering a period beyond that included in the reports to Congress. We reviewed the interagency agreement between USAID and the Centers for Disease Control and Prevention (CDC), outlining the CDC’s Zika response activities supported by $78 million in funds USAID obligated to CDC. We also obtained additional funding data from CDC and interviewed CDC officials to discuss the status of the agencies’ obligations and disbursements for Zika response activities. We analyzed USAID’s and State’s obligations and disbursements that the agencies reported as supporting the U.S. Zika response overseas, as of September 30, 2018. We analyzed agency obligations and disbursements across agency bureaus, funding accounts, and activities for the Zika response. Additionally, we interviewed officials from USAID and State to discuss the agencies’ obligations and disbursements for Zika response activities. We then reviewed the funding data and related documentation and consulted with USAID and State officials on the accuracy and completeness of the data. In the small number of instances where we identified potential issues or inconsistencies in the data, we contacted relevant agency officials and obtained information from them necessary to resolve the discrepancies. We assessed USAID’s tracking of funding data against federal internal control standards related to using quality information. We also utilized information from data reliability assessments for two recent GAO reports that utilized funding data from the same USAID and State systems. We determined that the data we used were sufficiently reliable for our purposes of examining USAID’s and State’s obligations and disbursements of the funds. To examine activities that USAID and State implemented in response to Zika overseas, we conducted fieldwork, analyzed agency documents, and interviewed officials. We examined the status and progress related to Zika response activities. We conducted a teleconference with officials in Haiti and El Salvador and conducted fieldwork in Barbados, Colombia, Dominican Republic, Guatemala, Honduras, Peru, and Trinidad and Tobago. We selected these countries based on the following criteria: (1) geographic diversity to include the Caribbean, Central America, and South America; (2) coverage of the main lines of effort (mosquito control, public awareness, capacity building, and research); and (3) the presence of activities under way that accounted for a significant portion of funding. During our fieldwork, we interviewed agency officials who played a role in Zika response activities, which included officials from State, USAID, and CDC. We also interviewed host government officials, implementing partners, health care workers, community volunteers, and researchers. In addition, we visited offices, toured facilities, and observed operations. We also attended a conference in Guatemala that addressed topics including status, successes, challenges, and lessons learned related to USAID’s Zika response. We reviewed agency documents describing the plans and goals of activities. We also analyzed progress reports of six activities to provide illustrative examples of results. We selected activities from those with among with the highest amounts of funding and that together represented approximately 33 percent of all USAID funding for Zika response and a range of countries, lines of effort, and types of implementing partners (such as nongovernmental organizations and international organizations). The sample is not generalizable to all of USAID’s Zika response activities. To examine challenges, if any, to implementing Zika response activities and actions taken to address any challenges, we interviewed U.S. government officials, USAID implementing partners, and host government officials, and we analyzed progress reports from selected USAID-funded Zika response activities. We identified key challenges based on the nature of the description and the degree to which a diversity of interviewees and documents made mention of them. We reviewed USAID policy, USAID’s infectious disease response plan, federal internal controls, implementing partner progress reports, and interviews with officials to determine what agencies did to address these challenges. We assessed USAID’s infectious disease response plan against relevant federal internal control standards. We conducted this performance audit from December 2017 to May 2019 in accordance with generally accepted government auditing standards. Those standards require that we plan and perform the audit to obtain sufficient, appropriate, evidence to provide a reasonable basis for our findings and conclusions based on our audit objectives. We believe that the evidence obtained provides a reasonable basis for our findings and conclusions based on our audit objectives. To provide illustrative examples of the results of Zika response activities funded by the U.S. Agency for International Development (USAID), we analyzed implementing partners’ progress reports for a sample of six activities. We selected activities from those with among the highest amounts of funding and that together represented approximately 33 percent of all USAID funding for Zika response and a range of countries, lines of effort, and types of implementing partners (such as nongovernmental organizations and international organizations). Quantitative figures related to individual indicators listed below reflect the targeted population of the activity. Start dates and funding information provided below reflect the date of the report to Congress in which the activity first appeared and the associated funds obligated. The sample is not generalizable to all USAID’s Zika response activities. Table 1 presents the progress on key indicators as of March 2018 reported to USAID by the Applying Science to Strengthen and Improve Systems activity. The aim of the activity was to strengthen Zika-related health services and systems in Latin America and the Caribbean with a focus on pregnant women, newborns, and women of reproductive age. Table 2 presents the progress on key indicators as of May 2018 reported to USAID by the International Federation of Red Cross and Red Crescent Societies Global Health activity. The activity aimed to reduce risks associated with Zika infection through promoting community involvement, sharing lessons learned, and improving practices. Table 3 presents the progress on key indicators as of March 2018 reported to USAID by the United Nations International Children’s Emergency Fund activity. The activity aimed to promote the adoption of prevention behaviors among at-risk populations through actions targeting multiple levels of their environment: individual, interpersonal, community, institutional, and national policy levels. Table 4 presents the progress on key indicators as of September 2017 reported to USAID by the Save the Children Community Action on Zika project. The goal of the project was to reduce Zika transmission and minimize the risk of Zika-related microcephaly and other neurological disorders among the most vulnerable through community-based prevention strategies. Table 5 presents the progress on an illustrative selection of key indicators, by objective, as of March 2018 reported to USAID by the Population Services International activity. The purpose of the activity was to improve the capacity and raise awareness of people in countries affected by and at risk of Zika and other vector-borne diseases. Table 6 presents illustrative examples of accomplishments as of March 2018 reported to USAID by the Zika AIRS Project (ZAP). This was a mosquito control project focused on reducing Zika transmission in Latin America and the Caribbean. Specific activities included entomological monitoring, larviciding, source reduction interventions, and indoor residual spraying. In addition to the contact named above, Joyee Dasgupta (Assistant Director), Marc Castellano (Analyst-in-Charge), Diana Blumenfeld, Alana Miller, Fatima Sharif, David Dayton, Francisco Enriquez, Christopher Keblitis, Amber Sinclair, and K. Nicole Willems made key contributions to this report.