Quantitative evaluation on the effectiveness of prevention and control measures against pandemic influenza A (H1N1) in Beijing, 2009
10.3760/cma.j.issn.0254-6450.2010.12.011
- VernacularTitle:北京市2009年甲型H1N1流感防控效果定量评价
- Author:
Xiao-Li WANG
1
;
Peng YANG
;
Zhi-Dong CAO
;
Da-Jun ZENG
;
Jiang WU
;
Yi ZHANG
;
Hai-Kun QIAN
;
Xiao-Min PENG
;
Hui-Jie LIANG
;
Xing-Huo PANG
;
Ying DENG
;
Xiong HE
;
Quan-Yi WANG
Author Information
1. 北京市疾病预防控制中心
- Keywords:
Influenza A (H1N1);
Measures to prevent and control pandemic influenza A (H1N1);
Quantitative evaluation;
Dynamics of infectious disease transmission
- From:
Chinese Journal of Epidemiology
2010;31(12):1374-1378
- CountryChina
- Language:Chinese
-
Abstract:
Objective To quantitatively evaluate the effectiveness of prevention and control measures against pandemic influenza A (H1N1) in Beijing, 2009 and to provide evidence for developing and adjusting strategies for prevention and control of the disease. Methods Considering the seasonality and the number of vaccination on pandemic influenza A (H1N1) , data regarding pandemic influenza A (H1N1) in Beijing were collected and analyzed. Based on the dynamics of infectious disease transmission, a quantitative model for evaluation of prevention and control measures was developed. Results Both latency and infectious periods of pandemic influenza A (H1N1) were estimated to be 1.82 days and 2.08 days, respectively. The effective reproduction numbers of the three periods were 1.13,1.65 and 0.96, respectively. Thanks to the implementation of a series of measures to prevent and control pandemic influenza A (H1N1), the cumulative number of laboratory-confirmed cases of pandemic influenza A (H1N1) was reduced, making it much smaller than what would have been under the natural situation. Specifically, the program on pandemic (H1N1) 2009 vaccination reduced the cumulative number of laboratory-confirmed cases by 24.08% and postponed the peak time. Conclusion Measures that had been taken during this period, had greatly contributed to the successful prevention and control of pandemic influenza A (H1N1). The 2009 Pandemic (H1N1)vaccination was confirmed to have contributed to the decrease of cumulative number of laboratoryconfirmed cases and postponed the peak arrival time.
