Abstract
Influenza is an acute respiratory tract infection caused by an influenza virus. Highly contagious, it spreads rapidly and widely and exhibits seasonal changes in infection rates.
Highlights
Influenza is an acute respiratory tract infection caused by an influenza virus
According to the data of positive detection rate and season distribution, H1N1 influenza A viruses are most common during spring and summer
In Shenzhen, the high incidence of influenza is identified in the spring
Summary
Influenza is an acute respiratory tract infection caused by an influenza virus. Contagious, it spreads rapidly and widely and exhibits seasonal changes in infection rates. The influenza virus is one of the major causes of acute respiratory tract infection in the world. The illness mainly occurs in children, especially schoolchildren aged 5-17 [2]. Influenza surveillance among Chinese pediatric patients will contribute to the understanding of the trends of influenza in China and to the understanding of the clinical characteristics of children with flu infection. Current surveillance projects in China focus mainly on outpatients with mild flu-like symptoms, and there is a dearth of data on severe and critically ill hospitalized children. Since January 2012, we have conducted a routine 2009 H1N1 influenza A testing on children hospitalized in Shenzhen Children’s Hospital for lower respiratory tract infection
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