Unvaccinated newborns and infants 42 days old or younger had significantly fewer rotavirus infections after the introduction of a universal mass vaccination (UMV) program, based on a decade of surveillance data from 11 pediatric care facilities in Austria.
“The present study aimed to investigate the long-term effect of UMV on rotavirus (RV)–associated hospitalizations, with particular focus on neonates and infants less than 6 weeks of age, comparing surveillance data between the prevaccination and postvaccination periods,” wrote Martina Prelog, MD, of University Hospital Wuerzburg (Germany), and her colleagues.
CDC/Dr. Erskine Palmer
The data included 10,960 laboratory-confirmed cases of RV covering the periods before and after the initiation of the mass vaccination program.
Overall, hospitalizations for community-acquired RV infections dropped by almost 90% across all age groups. Among young infants, nosocomial RV infection rates were 28% prior to the vaccination program and 19% afterwards. However, overall nosocomial RV infection rates increased from 6% before the vaccination program to 13% after the program, and 6% of the cases were breakthrough infections, generally after incomplete RV vaccination.
“High numbers of documented cases and similar trends in all centers bolster the conclusion that UMV with RV vaccination may be associated with lower rates of RV hospitalization in unvaccinated neonates and young infants, supporting the beneficial role of UMV,” Dr. Prelog and her associates wrote.
Find the full study here in the Journal of Infectious Diseases (2016. doi: 10.1093/infdis/jiw186).