High Vaccination Coverage among Children during Influenza A(H1N1)pdm09 as a Potential Factor of Herd Immunity.

ABSTRACT: The objective of this study was to identify factors related to the expansion of infection and prevention of influenza A(H1N1)pdm09. A retrospective non-randomized cohort study (from June 2009 to May 2010) on influenza A(H1N1)pdm09 was conducted in a sample of residents from Hiroshima Prefecture, Japan. The cumulative incidence of the influenza A(H1N1)pdm09 and the pandemic vaccine effectiveness (VE) were estimated. The response rate was 53.5% (178,669/333,892). Overall, the odds ratio of non-vaccinated group to vaccinated group for cumulative incidence of influenza A(H1N1)pdm09 was 2.18 (95% confidence interval (CI): 2.13-2.23) and the VE was 43.9% (CI: 42.8-44.9). The expansion of infection, indicating the power of transmission from infected person to susceptible person, was high in the 7

SUBMITTER: Matsuoka T 

PROVIDER: S-EPMC5086756 | biostudies-literature | 2016 Oct

REPOSITORIES: biostudies-literature