Epidemiological Characteristics of 150 Cases of Influenza A (H1N1) in Pinggu District of Beijing

[Objective]To realize the epidemiological characteristics of reported cases of influenza A(H1N1) in Pinggu district of Beijing,explore the epidemic pattern of this disease in Pinggu area,and evaluate the effect of the control measures.[Methods]The data of 150 cases of influenza A(H1N1) reported by epidemic situation network in Pinggu district in 2009 were statistically analyzed to investigate the basic characteristics of prevalence.By associating with the control strategies in different periods,the control measures were evaluated.[Results]Among 150 cases of influenza A(H1N1),the sex ratio(male: female) was 1.23 ∶1.The majority of patients(98) were in 10～19 years group,which accounted for 65.33% of total patients.101 patients were middle school students,which accounted for 67% of total patients.The patients in towns accounted for 62.67% of total patients,which the number was more than that in countryside.The epidemic of influenza A(H1N1) reached the peak in September,then showed a decreasing trend,and kept low and stable prevalence in November.[Conclusion]The epidemiological characteristics of influenza A(H1N1) in Pinggu area are in accordance with the general epidemiological characteristics in Beijing.Adjustment of the prevention and control measures timely play an important role in delaying the disease spread and preventing the multi-outbreak of influenza A(H1NI).