A member asked:

When is a cold sore no longer contagious? i know herpes is always there but when is a lesion "safe"? is it after the scab has fallen off?

A doctor has provided 1 answer
Dr. Kayvon Javid answered

Specializes in Dentistry

Never for sure: There is no way to tell for sure. Some people shed the virus all the time, even when they do not have a cold sore, while cold sores are most contagious when they are oozing fluid, the virus can be transmitted to others even during times when you have no blisters.

Answered 11/8/2014

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