Epidemiology of 2009 pandemic influenza A (H1N1) in Xianning of Hubei province

Objective To analyze the epidemiological characteristics of 2009 pandemic influenza A (H1N1) in Xianning. Methods The surveillance data of 2009 pandemic influenza A (H1N1), seasonal influenza and influenza like illness (ILI) in Xianning in 2009 were collected from national disease surveillance information reporting system,2009 pandemic influenza A (H1N1) reporting system and influenza surveillance information system to conduct statistical analysis by using Excel 2000. Results Forty one cases of 2009 pandemic influenza A (H1N1) were reported, including 2 severe cases, no death occurred. All the cases were infected locally. The incidence peak was similar to that of seasonal influenza. The cases were mainly distributed in urban area and outbreak mainly occurred in schools which affected students mostly. The cases were mild. The surveillance conducted by influenza network laboratories indicated that 2009 pandemic influenza A (H1N1) virus had become the predominant strain in the influenza pandemic. Conclusion The epidemiological characteristics of 2009 pandemic influenza A (H1N1) was different from that of seasonal influenza in Xianning, Due to the effective prevention and control, no wide spread of the disease occurred, which provide evidence for the revision of influenza prevention and control measures.