Influenza… Circulating viruses and vaccination

Stephani Schmidt

Abstract


Influenza or “flu” is an acute viral respiratory infection caused by seasonal influenza viruses and distinct outbreaks of varying degrees occur every year. The severity of illness depends on the characteristics of both the infected person and the virus. Circulating seasonal influenza viruses have the ability to change constantly. In order to ensure optimal efficacy, the vaccine strains selected should match the circulating strains as closely as possible. Annual influenza vaccination is the most effective method to prevent flu and complications from flu. It is especially important to vaccinate persons at increased risk for severe disease or influenza-related complications.

Keywords


influenza; circulating viruses; vaccination

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