Cold sores are very contagious. Also called fever blisters, cold sores are the result of the herpes simplex 1 virus (HSV-1). HSV-1 is related to the virus that causes genital…
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Cold sores are very contagious. Also called fever blisters, cold sores are the result of the herpes simplex 1 virus (HSV-1). HSV-1 is related to the virus that causes genital…