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A member asked:

How long after symptoms of flu show is it contagious for. and how long is the period of seeing if you will get it?

A doctor has provided 1 answer

2-5 day incubation : Influenza has a rapid onset and becomes infectious rapidly after symptoms are aquired. Tests for influenza become mostly positive when symptoms are prevalent

Dr Ali and another doctor agreed

Answered 5/2/2015

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