A member asked:

What to do if i kissed someone who had mono 4 years ago, did i catch it from them?

A doctor has provided 1 answer

Hard to say: The primary contagious period from mono is the first 3 weeks after onset.Yet some remain contagious for a few months and in some, the germ can hibrenate and shed intermittantly for years.Some also can have such a mild case that they spread it to others during their illness and never realize they are or were sick.

Answered 9/9/2013

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