Effect of Vaccination on Bordetella pertussis Strains, China
Liu Zhang1, Yinghua Xu1, Jianhong Zhao, Teemu Kallonen, Shenghui Cui, Yunqiang Xu, Qiming Hou, Fengxiang Li, Junzhi Wang, Qiushui He, and Shumin Zhang
Author affiliations: National Institute for the Control of Pharmaceutical and Biological Products, Beijing, People’s Republic of China (L. Zhang, Y. Xu, S. Cui, Q. Hou, F. Li, J. Wang, S. Zhang); Hebei Medical University, Shijiazhuang, PRC (J. Zhao); The Second Hospital of Shijiazhuang City, Shijiazhuang (Y. Xu); National Institute for Health and Welfare, Turku, Finland (T. Kallonen, Q. He); University of Turku, Turku (T. Kallonen)
Figure 1. Number of reported pertussis cases and pertussis vaccination coverage in China, 1983–2008 (12). Although vaccination coverage increased with time, it was low before the 1980s and only 58% in 1983.
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