Please select the eligibility criteria that correspond to the clinical trial below.
Title: A Randomized, Double-blind, Placebo-controlled Phase 2a Study to Evaluate the Safety and Immunogenicity of Seasonal Influenza Vaccine and Ad26.RSV.preF, With and Without Co-administration, in Adults Aged 60 Years and Older in Stable Health
Brief Summary: The purpose of this study is to demonstrate the non-inferiority of the concomitant administration of an adenovirus serotype 26- based vaccine encoding for the respiratory syncytial virus pre-fusion F protein (Ad26.RSV.preF) and seasonal influenza vaccine versus the administration of seasonal influenza vaccine alone in terms of humoral immune response expressed by the geometric mean titers (GMTs) of hemagglutination inhibition (HI) antibody titers against all four influenza vaccine strains 28 days after the administration of influenza vaccine, and to assess the safety and tolerability of a single dose of 1\*10\^11 viral particles (vp) of Ad26.RSV.preF, administered intramuscularly to participants aged greater than or equal to 60 years separately or concomitantly with seasonal influenza vaccine.


Options:
A: Adult Inclusion Criteria:

* In good health
* Available for the duration of the trial
* Available for post-inoculation telephone contact
* For females, must agree to use effective birth control methods for the duration of the study

Seropositive Children Inclusion Criteria:

* In good health
* Seropositive for HPIV1
* Available for the duration of the study

Seronegative Infants and Children Inclusion Criteria:

* In good health
* Seronegative for HPIV1 antibody
* Available for the duration of the study

Adult Exclusion Criteria:

* Neurologic, cardiac, pulmonary, hepatic, rheumatologic, autoimmune, or renal disease
* Condition, in the opinion of the investigator, that will not allow the participant to comply with the protocol
* Alcohol or drug abuse
* History of anaphylaxis
* History of splenectomy
* Diagnosis of asthma within 2 years of study entry
* HIV-infected
* Hepatitis C infection
* Hepatitis B infection
* Abnormal urinalysis
* Known immunodeficiency syndrome
* Current use of nasal or systemic steroid medications
* Receipt of blood products within 3 months of study entry
* Current smoker unwilling to stop smoking for the duration of the study. The decision to exclude a potential subject is made by the investigator based upon the potential subject's medical history and physical examination.
* Participation in another investigational vaccine or drug trial within 30 days of receiving the investigational vaccine
* Receipt of live vaccine within 4 weeks or a killed vaccine within 2 weeks or immune globin within 3 months prior to receiving the investigational vaccine
* Previous immunization with an HPIV1 vaccine
* Known hypersensitivity to any vaccine component
* Participants whose profession and/or personal responsibilities involve caring for children less than 6 months of age or for immunosuppressed individuals
* Persistent systolic blood pressure more than 140 mm Hg or diastolic pressure more than 90 mm Hg
* Body mass index (BMI) more than 35
* Pregnant or breastfeeding

Seropositive and Seronegative Infants and Children Exclusion Criteria:

* Known or suspected impairment of immunological functions as determined by the investigator
* Major congenital malformations, including congenital cleft palate, cytogenetic abnormalities, or serious chronic disorders
* Previous immunization with HPIV1 vaccine
* Current use of nasal or systemic steroid medications
* Previous serious vaccine-associated adverse event or anaphylactic reaction
* Known hypersensitivity to any vaccine component
* Lung or heart disease, including reactive airway disease as determined by the investigator
* Member of household that includes an immunocompromised individual or infant less than 6 months of age
* Attends day care with infants less than 6 months of age or immunosuppressed individuals. More information about this criterion can be found in the protocol.
* Participation in another investigational vaccine or drug trial within 30 days of receiving the investigational vaccine or while study is occurring
B: Inclusion Criteria:

* Each participant must sign an informed consent form (ICF) indicating that he or she understands the purpose of and procedures required for the study, is willing to participate in the study and attend all scheduled visits, and is willing and able to comply with all study procedures and adhere to the prohibitions and restrictions specified in this protocol
* Before randomization, a woman must be:

  1. Postmenopausal (A postmenopausal state is defined as no menses for 12 months without an alternative medical cause) and
  2. Not intending to conceive by any methods
* In the investigator's clinical judgment, participant must be either in good or stable health, and not at risk of serious complications from influenza. Participants may have underlying illnesses such as hypertension, type 2 diabetes, hyperlipoproteinemia, or hypothyroidism, as long as their symptoms/signs are medically controlled. If they are on medication for a condition, the medication dose must have been stable for at least 12 weeks (or only small, clinically non-significant changes have been made in the judgement of the Principal Investigator) preceding vaccination and expected to remain stable for the duration of the study. Participants will be included on the basis of physical examination, medical history, vital signs, and 12-lead electrocardiogram (ECG) performed on Day 1
* From the time of first vaccination through 3 months after the second dose of study vaccine, participant agrees not to donate blood
* Participant must be willing to provide verifiable identification, have means to be contacted and to contact the investigator during the study

Exclusion Criteria:

* Participant has acute illness (this does not include minor illnesses such as diarrhea) or temperature greater than or equal to (\>=) 38.0 degree Celsius (ºC) within 24 hours prior to the first dose of study vaccine; enrollment at a later date is permitted
* Participant has a serious chronic disorder, including severe chronic obstructive pulmonary disease or clinically significant congestive heart failure, requirement for supplemental oxygen, end stage renal disease with or without dialysis, clinically unstable cardiac disease, Alzheimer's disease, or has any condition for which, in the opinion of the investigator, participation would not be in the best interest of the participant (for example, compromise well-being) or that could prevent, limit, or confound the protocol-specified assessments
* Participant has history of malignancy within 5 years before screening (exceptions are squamous and basal cell carcinomas of the skin and carcinoma in situ of the cervix, or malignancy, which is considered cured with minimal risk of recurrence)
* Participant has had major surgery (per the investigator's judgment), within 4 weeks before dosing, or will not have fully recovered from surgery, or has surgery planned during the time the participant is expected to participate in the study or within 6 months after the final dose of study vaccine
* Participant has chronic active hepatitis B or hepatitis C infection, documented by hepatitis B surface antigen and hepatitis C antibody, respectively
C: Inclusion Criteria:

* Good health based on review of the medical record, history, and physical examination, without evidence of chronic disease.
* Parents/guardians willing and able to provide written informed consent as described in the protocol.
* Seronegative for RSV antibody, defined as a serum RSV-neutralizing antibody titer less than 1:40 at screening from a sample collected no more than 42 days prior to inoculation. Note: results from specimens collected during screening for any study of an RSV vaccine developed by the Laboratory of Infectious Diseases (LID) (NIAID, NIH) were acceptable as long as within the 42-day window.
* Growing at a normal velocity for age (as demonstrated on a standard growth chart) AND

  * If less than 1 year of age: current height and weight above the 5th percentile
  * If 1 year of age or older: current height and weight above the 3rd percentile for age.
* Received routine immunizations appropriate for age (as per national Center for Disease Control Advisory Committee on Immunization Practices \[ACIP\]). Note: if rotavirus immunization was delayed, "catch-up" rotavirus immunization was indicated only if the participant was age-eligible per ACIP.
* Expected to be available for the duration of the study.
* If born to an HIV-infected woman, participant must not have been breastfed and must have had documentation of 2 negative HIV nucleic acid (RNA or DNA) test results from samples collected on different dates with both collected when greater than or equal to 4 weeks of age and at least one collected when greater than or equal to 16 weeks of age, and no positive HIV nucleic acid (RNA or DNA) test; or 2 negative HIV antibody tests, both from samples collected at greater than or equal to 24 weeks of age.

Exclusion Criteria:

* Known or suspected HIV infection or impairment of immunological functions.
* Receipt of immunosuppressive therapy, including any systemic, including either nasal or inhaled, corticosteroids within 28 days of enrollment. Note: Cutaneous (topical) steroid treatment was not an exclusion.
* Bone marrow/solid organ transplant recipient.
* Major congenital malformations (such as congenital cleft palate) or cytogenetic abnormalities.
* Previous receipt of a licensed or investigational RSV vaccine (or placebo in any IMPAACT RSV study) or previous receipt of or planned administration of any anti-RSV product (such as ribavirin or RSV immunoglobulin \[IG\] or RSV monoclonal antibody \[mAb\]).
* Previous anaphylactic reaction.
* Previous vaccine-associated adverse reaction that was Grade 3 or above.
* Known hypersensitivity to any study product component.
* Heart disease. Note: Participants with cardiac abnormalities documented to be clinically insignificant and requiring no treatment may be enrolled.
* Lung disease, including any history of reactive airway disease or medically diagnosed wheezing.
* Member of a household that contained, or would contain, an infant who was less than 6 months of age at the enrollment date through Day 28.
* Member of a household that contains another child who was, or was scheduled to be, enrolled in IMPAACT 2011, 2012 or 2013 or another study evaluating an intranasal live-attenuated RSV vaccine, AND there had been or would be an overlap in residency during that other child's participation in the study's Acute Phase (Days 0 to 28).
* Member of a household that contained an immunocompromised individual, including, but not limited to:

  * a person who was greater than or equal to 6 years of age with HIV-related immunodeficiency, defined as having a most recent CD4 T lymphocyte cell count less than 300 cells/mm\^3. CD4 T lymphocyte count must have been measured within 6 months prior to enrollment, or
  * a person age 1 year up to less than 6 years with HIV-related immunodeficiency, defined as having a most recent CD4 T lymphocyte cell percentage less than 25 or CD4 T lymphocyte count less than 750 cells/mm\^3 (if both values are available, use the lower of the two). CD4 T lymphocyte parameter must have been measured within the 6 months prior to enrollment; or
  * a person age less than 1 year with HIV-related immunodeficiency, defined as having a most recent CD4 T lymphocyte cell percentage less than 30 or CD4 T lymphocyte count less than 1000 cells/mm\^3 (if both values are available, use the lower of the two). CD4 T lymphocyte parameter must have been measured within the 6 months prior to enrollment; or
  * a person who had received chemotherapy within the 12 months prior to enrollment; or
  * a person receiving immunosuppressant agents; or
  * a person living with a solid organ or bone marrow transplant.

Verbal report of CD4 T cell lymphocyte was sufficient documentation if the parent/guardian was confident of history.

* Attended a daycare facility and shared a room with infants less than 6 months of age, and parent/guardian was unable or unwilling to suspend daycare for 28 days following inoculation.
* Any of the following events at the time of enrollment:

  * fever (rectal temperature of greater than or equal to 100.4°F (38°C)), or
  * upper respiratory signs or symptoms (rhinorrhea, cough, or pharyngitis) or
  * nasal congestion significant enough to interfere with successful inoculation, or
  * otitis media.
* Receipt of the following prior to enrollment:

  * any inactivated vaccine or live-attenuated rotavirus vaccine within the 14 days prior, or
  * any live vaccine, other than rotavirus vaccine, within the 28 days prior, or
  * another investigational vaccine or investigational drug within 28 days prior
* Scheduled administration of the following after planned inoculation:

  * inactivated vaccine or live-attenuated rotavirus vaccine within the 14 days after, or
  * any live vaccine other than rotavirus in the 28 days after, or
  * another investigational vaccine or investigational drug in the 56 days after
* Receipt of immunoglobulin, any antibody products, or any blood products within the past 6 months
* Receipt of any of the following medications within 3 days of study enrollment:

  * systemic antibacterial, antiviral, antifungal, anti-parasitic, or antituberculous agents, whether for treatment or prophylaxis, or
  * intranasal medications, or
  * other prescription medication except as listed below

Permitted concomitant medications (prescription or non-prescription) include nutritional supplements, medications for gastroesophageal reflux, eye drops, and topical medications, including (but not limited to) cutaneous (topical) steroids, topical antibiotics, and topical antifungal agents.

* Receipt of salicylate (aspirin) or salicylate-containing products within the 28 days prior to enrollment.
* Born at less than 34 weeks gestation.
* Born at less than 37 weeks gestation and less than 1 year of age at the time of enrollment.
* Suspected or documented developmental disorder, delay, or other developmental problem.
* Previous receipt of supplemental oxygen therapy in a home setting.
D: Inclusion Criteria:

* Each participant must sign an Informed Consent Form (ICF) indicating that he or she understands the purpose of and procedures required for the study, is willing to participate in the study and attend all scheduled visits, is willing to be isolated and stay in the clinic for the quarantine phase, and is willing and able to comply with all study procedures and adhere to the prohibitions and restrictions specified in this protocol
* Participants must be in good health, without significant medical illness, on the basis of a medical evaluation that reveals the absence of any clinically relevant abnormality and includes a physical examination (including height and weight), skin examination, medical history, vital signs (systolic and diastolic blood pressure and heart rate, respiratory rate, and body temperature), and the results of clinical laboratory tests performed within 56 days of vaccination. If there are abnormalities, the participant may be included only if the investigator judges the abnormalities or deviations from normal to be not clinically significant. This determination must be recorded in the participant's source documents and initialed by the investigator
* Participants must have a non-clinically significant 12-lead electrocardiogram (ECG) within 56 days of vaccination including: normal sinus rhythm (heart rate between 50 and 100 beats per minute \[bpm\], extremes included); QT interval corrected for heart rate according to Fridericia (QTcF) interval less than or equal to (\<=) 450 millisecond (ms); QT interval corrected for heart rate according to Bazett (QTcB) interval \<= 450 ms; QRS interval less than (\<) 120 ms; PR interval \<= 210 ms
* Participants must be sero-suitable for respiratory syncytial virus (RSV) within 90 days of vaccination (low immunity to the RSV-A Memphis 37b virus using a virus neutralization assay
* Participant must be healthy on the basis of clinical laboratory tests performed within 56 days of vaccination. If the results of the laboratory screening tests are outside the local laboratory normal reference ranges and additionally within the limits of toxicity Grade 1 according to the US Food and Drug Administration (FDA) toxicity tables (that is, for tests in the FDA table), the participant may be included only if the investigator judges the abnormalities or deviations from normal to be not clinically significant and appropriate and reasonable for the population under study. This determination must be recorded in the participant's source documents and initialed by the investigator

Exclusion Criteria:

* Participant has acute illness (this does not include minor illnesses such as diarrhea) or temperature greater than or equal to (\>=) 37.8 degree Centigrade within 24 hours prior to study vaccination
* Participant has history of malignancy (exceptions are basal cell carcinomas of the skin treated over 5 years prior to vaccination considered cured with minimal risk of recurrence)
* Participant has chronic active hepatitis B or hepatitis C infection, documented by hepatitis B surface antigen and hepatitis C antibody, respectively

Viral Challenge Exclusion Criteria:

* Participants having donated or lost more than 1 unit of blood (470 milliliter \[mL\]) within 60 days or more than one unit of plasma within 7 days
* Participants with active acute respiratory infection

Answer: B