Vaccine Candidates for RSV Ward Off Severe Illness in Older Adults

(MedPageToday) Prefusion F protein vaccine candidates for respiratory syncytial virus (RSV) proved safe in adults 60 and up while demonstrating an ability to thwart lower respiratory tract illness, including severe cases, a pair of large phase III trials showed. A single dose of an RSV prefusion F protein vaccine (RSVPreF3 OA) yielded a vaccine efficacy of 82.6% against lower respiratory tract illness (96.95% CI 57.9-94.1), meeting the study’s primary endpoint, and vaccine efficacy landed at 94.1% against severe RSV illness (95% CI 62.4-99.9), reported Michael Ison, MD, MS, of Northwestern University Feinberg School of Medicine in Chicago, at the annual IDWeek meeting.