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Cold sores are caused by herpes simplex virus. Signs and symptoms of herpes infection. Herpesviruses Herpes Simplex I Ii Cold Sores Genital Herpes Herpes simplex virus 1 and 2 hsv 1 and hsv 2 also known as human herpesvirus 1 and 2 hhv 1 and hhv 2 are two members of the human herpesviridae family a set of viruses that produce viral infections in the majority of humans.

Oral herpes is an infection caused by the herpes simplex virus is estimated to be present in 50 to 80 percent of the american adult population. Herpes can be annoying and painful but it usually doesnt lead to serious health problems. Herpes Virus Types Causing Disease In Humans 2 5 Download Table Herpes type 1 hsv 1 or oral herpes and herpes type 2 hsv 2 or genital herpes.