Journal
CURRENT INFECTIOUS DISEASE REPORTS
Volume 19, Issue 3, Pages -Publisher
SPRINGER
DOI: 10.1007/s11908-017-0566-9
Keywords
Yellow fever; Flavivirus; Vaccine; Fractional dosing; Angola; Democratic Republic of Congo
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Funding
- R21 grant from NIH/NIAD
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Purpose of Review Live attenuated 17D vaccine is considered one of the safest and efficacious vaccines developed to date. This review highlights what is known and the gaps in knowledge of vaccine-induced protective immunity. Recent Findings Recently, the World Health Organization modifying its guidance from 10-year booster doses to one dose gives lifelong protection in most populations. Nonetheless, there are some data suggesting immunity, though protective, may wane over time in certain populations and more research is needed to address this question. Despite having an effective vaccine to control yellow fever, vaccine shortages were identified during outbreaks in 2016, eventuating the use of a fractional-dosing campaign in the Democratic Republic of the Congo. Summary Limited studies hinder identification of the underlying mechanism(s) of vaccine longevity; however, concurrent outbreaks during 2016 provide an opportunity to evaluate vaccine immunity following fractional dosing and insights into vaccine longevity in populations where there is limited information.
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