2 doctors weighed in:

What period of time is someone who has a common cold contagious?

2 doctors weighed in
Dr. Thomas Costello
ENT - Head & Neck Surgery
1 doctor agrees

In brief: Hard to say

You are probably most contagious for the 48 hours before you show any symptoms.
You will stay contagious as long as you have symptoms. You should be careful of what contact you have with others, particularly if they are very old or very young or have an immune problem (including those on chemotherapy).

In brief: Hard to say

You are probably most contagious for the 48 hours before you show any symptoms.
You will stay contagious as long as you have symptoms. You should be careful of what contact you have with others, particularly if they are very old or very young or have an immune problem (including those on chemotherapy).
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