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module menu icon Influenza: Cause and Symptoms

There are 3 types of influenza virus: A,B and C

Most clinical illnesses are caused by type A&B

Of the 1064 ICU admissions during the 2016/17 season 95% where attributed to Type A/5% Type B.


Genetic changes

The flu virus is constantly changing. They can change in two different ways.


Virus naming

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