Update: Impact of 2019 Novel Coronavirus and Blood Safety(last updated February 25, 2020 by AABB’s Transfusion Transmitted Diseases Committee)

Update on SARS-CoV-2 (COVID-19)
The following report was developed based on data available on February 25, 2020:
1. Epidemiology: Little has change regarding estimates of basic epi parameters during thelast two weeks.
a. There are 80,350 cases and 2705 deaths listed on the Johns Hopkins dashboard at
1200 EST 25 Feb 2020.
b. These are the locations and case counts for those areas with CDC travel alerts.
The alert level is in parentheses.
i. 77,660 in mainland China (3)ii. 977 in South Korea (3)iii. 288 in Italy (2)iv. 170 in Japan (2)v. 95 in Iran (2)vi. 84 Hong Kong (1)c. Based on these travel alerts, sustained person-to-person transmission appears tobe confined to areas of Asia, Italy and Iran.
d. Estimates of the basic reproductive number continue to be in the 2-3 range. On
the Diamond Princess, a captive population, the estimate is 2.28.
e. The case fatality rate continues to be estimated in the 2-3% range but is mostprobably biased high by a lack of diagnosis and reporting of mild cases. A WHO
Situation Report from Feb. 20, estimates the infection fatality rate, which will be
more informative in the long run, at 0.94% (95% CI, 0.37-2.9%), but that too islikely biased by case recognition and reporting.
2. Transfusion Transmission: There continue to be no reports of TTI. The data on
RNAemia is unchanged from prior communications. Approximately 15% of clinically illpatients in one study had RNA in plasma or serum, but the presence or absence ofinfectious virus has not been reported and there remains no precedent for the occurrenceof transfusion-transmitted respiratory viruses.
3. Transmission by Pre- or Asymptomatic Infection: These are the donors that we would
be concerned about, productively infected but well.
a. On the Diamond Princess, at the end of quarantine, the following totals weredisseminated via the Japanese Ministry of Health. Follow up is not completeenough to judge the significance of this high rate of asymptomatic infection.

i. Total crews and passengers at risk

3011

ii. SARS-CoV-2 positive (PCR)

621

iii. Positive and asymptomatic as of 19 Feb322

b. Discounting the original German report of transmission from an asymptomatic
index because of controversy about the quality of the evidence, there are twocredible family clusters from China that suggest that pre-symptomatictransmission occurs (Yu P et al. JID. 2020. Tong Z-D et al. EID. 2020).
c. Of 126 individuals arriving by air in Germany, 11 who were contacts ofconfirmed or suspected cases or who were symptomatic were all PCR negative.
Of 115 asymptomatic individuals without contact, 114 that throat swabs weredone, 112 were negative and 2 were positive (Hoehl S et al. NEJM. 2020).
4. Precautionary Measures
a. A short survey of US blood collection facilities will be available at week’s end
regarding the implementation, if any, of precautionary measures to reduce thetheoretical transfusion transmission of SARS-CoV-2.
b. The decision to implement optional precautionary measures resides with each
responsible blood collection facility. FDA’s communication does not specify thetype of CDC Travel Notices that would prompt an update for self-deferral for
travel. Similarly, blood centers electing to implement donor screening questions
and travel deferrals have the flexibility to determine the type of travel notice thatwould trigger a travel deferral.
c. To establish a consistent approach and simplify operations, some centers havedecided to implement travel deferral when CDC issues a Level 2 travel alert for acountry. The level 2 alerts posted to date contain this language “[country] isexperiencing sustained community spread of respiratory illness (COVID-19)
caused by the novel coronavirus” (emphasis added). This practice allows time for
implementation of the change before the urgency that follows a Level 3 warning.
Other centers may elect to implement a change based on a Level 3 warning.
d. An excellent summary of considerations for blood operators from the Asia Pacific
Blood Network is available and attached to this summary.
Conclusion: At this time, additional interventions are not necessary based on TTI risk data, but
continued vigilance is important.

Last Updated February 20, 2020
AABB continues to closely monitor the outbreak of respiratory illness caused by a novel (new)coronavirus first identified in Wuhan, Hubei Province, China (2019-nCoV). This update provides
insight into the current issues impacting blood safety.
Key Points••••••The 2019-nCoV epidemic continues, with the number of cases growing rapidly in Chinaand additional cases being reported outside China
No transmissions by blood or other substances of human origin have been documented oralleged for 2019-nCoV. This is true, as well, for the other two coronaviruses that haveemerged over the past two decades (SARS, the Severe Acute Respiratory SyndromeCoronavirus and MERS-CoV, causing Mideast Respiratory Syndrome).
AABB, FDA, and CDC are not recommending any action by blood collection
establishments at this time because there are no data or precedent suggesting risk oftransfusion transmission
Voluntary implementation of donor deferral for travel to China may address publicconcerns about the safety of the blood supply
A range of options are available to blood collection establishments considering
implementation of voluntary measures [POSTED 02 20 2020: AABB’s Optional
Resources for FDA’s Communication to Blood Establishments Regarding the COVID-19
Outbreak, February 2020]
AABB will continue to closely monitor the outbreak and will provide frequent updates
outbreaks
02 19 2020: CDC identifies new Level 1 outbreak in Hong Kong.

Novel Coronavirus BackgroundAs described by CDC, coronaviruses are a large family of viruses that are common in manydifferent species of animals, including camels, cattle, cats, and bats. Rarely, animal
coronaviruses can infect people and then spread between people such as with MERS and SARS.
When person-to-person spread has occurred with MERS and SARS, it is thought to have
happened mainly via respiratory droplets produced when an infected person coughs or sneezes,
similar to how influenza and other respiratory pathogens spread. During the past 20 years,SARS, MERS-CoV and the 2019-nCoV have emerged to cause human disease, including
substantial morbidity and mortality.
The outbreak of 2019-nCoV in Wuhan, China was initially associated with a large seafood andanimal market, suggesting animal-to-person spread. A growing number of patients have not hadsuch exposure, indicating person-to-person spread is occurring. At this time, estimates suggest
each infected person in China is infecting 2-3 additional people by respiratory droplet spread anddirect contact with infected secretions.

The CDC’s latest situation summary updates are available on the web page 2019 Novel
Coronavirus, Wuhan, China. Preliminary data suggest this virus may have arisen as a bat CoV,
as did SARS before it jumped to palm civets and then to humans. Early reports have identified
2019-nCoV RNA in the blood of 15% of patients studied in a small Chinese series. The authorsof that paper were careful to emphasize that RNA is not synonymous with infectious virus, whichindicates there is no clear evidence for blood-borne transmission.
Current OutbreakIn addition to the China outbreak, there are 21 countries with confirmed 2019-nCoV cases,
almost all acquired during travel to China. Secondary cases without a history of exposure in
China are now being recognized, and the extent of that person-to-person transmission will haveimportant implications both generally for control of the outbreak(s) and specifically for any
blood safety responses implemented by AABB member blood collection establishments invarious locations.
As of January 30th, the World Health Organization declared the outbreak of 2019-nCoV a global
health emergency after slightly more than 8000 cases in China had been recognized, with 171
deaths. At that time, there were:•••

21 countries outside of China that have reported imported infections with 2019-nCoV,
andautochthonous transmissions from China travelers to nontravelers (reported in Germany,Viet Nam, and the US)
one hundred and sixty five reported investigations in the US, with 5 confirmed
infections, 68 in which infection was ruled out and 92 pending.

The outbreak is evolving quickly and more current information on the outbreak will be available
from the CDC where case counts are being updated on Monday, Wednesday, and Friday.
Options for Blood Safety Interventions
As there are no data or precedent suggesting an impact on blood safety, CDC and FDA have notprovided guidance or recommendations to blood establishments. AABB is also notrecommending implementation of any measures at this point. However, blood collection
establishments may choose voluntary interventions as a precaution, such as deferrals for travel toChina. As such, AABB’s Transfusion Transmitted Diseases (TTD) Committee has provided anassessment of the outbreak to help inform blood collection establishments that are contemplating
voluntary interventions. TTD members expressed support for a range of approaches, recognizingthat public perception may be an important consideration during this outbreak. In the absence of
FDA recommendations, approaches include but are not limited to:1) Voluntary Implementation of Travel deferrals• Blood collection establishments can implement more restrictive donor eligibility anddeferral policies based on local concerns, such as this outbreak.
• In the absence of sustained person-to-person transmission locally, some blood collection
establishments are considering or have implemented a travel deferral. The mechanisms

for deferral include: 1) self-deferral based on donor education information provided byblood centers or 2) temporarily revising the flowchart for the travel capture question on
the donor history questionnaire (DHQ) to identify individuals who have traveled to China
in the past 28 days.
o A 28 day deferral covers twice the maximum incubation period of 2019nCoV.
o Data from a 2015-6 travel survey suggest this would impact approximately1/500 US blood donors overall.
•A donor deferral strategy can be implemented using the current travel question in theDHQ (question 27) and adds a new path to defer prospective donors for 28 days after
their exit from China. This approach has the advantage that additional countries can beadded as needed. Alternatively, the question can be added to the end of the DHQ. As
described in the User Brochure for the DHQ, flowcharts may be revised to reflect local
policy, and questions may be added to the DHQ as long as deferrals are not made lessstrict than those required by AABB and FDA. Example flowcharts are provided for thisapproach.

2) Combination of deferrals related to illness and contact and enhanced education
If an area experiences sustained local transmissions, blood collection establishments may
consider a more aggressive set of interventions, similar to those used at the time of theSARS outbreak (i.e., a combination of donor education, travel deferrals, deferrals forcontact with SARS and for a diagnosis of SARS.) AABB is actively working with theDonor History Task Force to prepare documents and resources to support the adoption ofthese measures if needed.
If FDA and CDC determine there is evidence indicating risk for transfusion transmission of
2019-nCoV, FDA may issue recommendations. If this occurs, blood collection establishments
should implement the new recommendations that are deemed necessary to protect blood safety.
Until such time, a decision to implement additional interventions resides at the local level.
Additional Considerations:
Blood collection establishments in Canada, Australia and the European Union have implemented
travel deferrals of 21-28 days. Canada routinely defers donors for 21 days following international
travel which addresses potential risks posed by emerging infectious disease agents, such as 2019nCoV. As noted, the deferral period of 28 days represents twice the maximum reported
incubation period (14 days) from exposure to onset of symptoms and is the surveillance intervalbeing used in public health reporting by CDC.
If the evidence indicates risk for transfusion transmission of 2019-nCoV, pathogen reduction
may be another option available. The TTD Committee is reviewing data on available pathogen
reduction measures for labile components and recognized that methods with valid data
demonstrating coronavirus inactivation would be acceptable safety approaches for 2019-nCoV.

The multiple pathogen removal and inactivation steps involved in plasma fractionation wereconsidered adequate to maintain their safety, and the committee understood that the Plasma
Protein Therapeutics Association would be considering that evidence in the coming days.
Conclusion
The ultimate course of the epidemic is not known. AABB is working closely with FDA and CDC
and will continue to monitor the situation and will expedite the development of tools and otherinformational resources as needed. Accordingly, the TTD committee endorsed the development
by staff and committee members of a Coronavirus Tool Kit [POSTED 02 20 2020: AABB’s
Optional Resources for FDA’s Communication to Blood Establishments Regarding the COVID19 Outbreak, February 2020] based on the approaches used during the SARS epidemic that could
be adopted as needed in the future. The AABB is taking additional measures to provide rapid
staging of additional interventions for the protection of blood safety and the safety of staff inblood collection establishments should they be needed.