Health

10 Frequently Asked Questions About Cold Sores

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4. Are Cold Sores Contagious?

Cold sores are contagious, so the virus can pass to another person through direct contact.

“A cold sore sheds herpes simplex virus into the saliva, and spreads when the infected saliva contacts another person’s mucosal surfaces (like their lips) or small cracks in the skin,” says Allison Arthur, MD, a dermatologist based in Orlando, Florida.

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