Epidemiological investigation and analysis of an influenza a outbreak in a primary school
Objective This study was aimed at conducting an epidemiological investigation analysis of an outbreak of influenza A in a primary school,to provide guidance for the prevention and control of influenza in schools.Methods Through a field epidemiological investigation,throat swab samples of affected students were collected for pathogen detection and case-control study analysis of the epidemic characteristics.Results A total of 96 cases of influenza-like illness were identified.The median isolation period was 3 days,and the average was 3.4 days,which was shorter than the average incuba-tion period(4.65 days).Of 15 throat swabs collected,seven samples were positive for H1N1 influenza virus,and three sam-ples were positive for H3 subtype influenza virus.Conclusions The outbreak was caused by influenza A virus.Schools should detect cases in a timely manner,standardize management,and strengthen monitoring of resuming classes and respira-tory isolation measures,such as wearing masks,in the event of influenza outbreak.
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