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Types of Cold Sore

There are two general types of fever blisters.  A fever blister caused by herpes virus 1 is the most common.  It is contagious and is easy to pass from person to person.  The second type of cold sore is caused by herpes virus type 2.  Herpes type 2 virus usually causes genital sores.  It is uncommon to have a cold sore caused by this virus but it does happen.

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