Epidemiological characteristics of 2009 H1N1 influenza, Fuzhou.

Objective To analyze the epidemiological characteristics of 2009 H1N1 influenza in Fuzhou.Methods The data of 2009 H1N1 influenza cases were collected and analyzed for risk factors.Results A total of 1 701 confirmed cases of 2009 H1N1 influenza were reported in Fuzhou.There were three peaks of incidences,which occurred in the middle ten days of June,at the final ten days of September and at the beginning ten days of December,2009.Most of cases were found in urban area and the highest incidence rate was reported in Cangshan(57.59/100 000).The incidence rate was 1.44:1 for male to female.92.06% of cases occurred in population group under 29 years old.Conclusion The outbreak of 2009 H1N1 could be controlled with scientific and practical interventions.Additional measures of disease prevention and control should be implemented in schools and kindergartens.