[Analysis on the surveillance of adverse events following immunization in China, 2007-2008].

Abstract

Comparing with 2005-2006, the completeness and sensitivity of national AEFI surveillance system were improved greatly in 2007-2008, but it still needs to be strengthened. The NIP vaccines were significantly related to the introduced vaccines in Expanded Immunization Program. AEFIs occurrence mostly in young children, first-dose and the early period of vaccination. The pilot study showed that safety of NIP vaccines and the quality of immunization services are satisfied.