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Are cold sores contagious?

The herpes simplex virus that causes cold sores is contagious. The viruses spread through contact with blisters or saliva from an infected person.

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About this article

Author: Dr Joanne Van der Velden PhD, BSc (Hons)
First answered: 19 Sep 2014
Last reviewed: 17 Oct 2018
Rating: 4.0 out of 5
Votes: 1342 (Click smiley face below to rate)
Category: Genital herpes

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