ISM / SCIENCE PHOTO LIBRARY ISM / SCIENCE PHOTO LIBRARY
Oral herpes infection. Close-up of blisters on the lips and tongue of a 70-year-old female patient with oral herpes. Oral herpes (herpes labialis) is a form of herpes simplex virus (HSV) infection that affects the mouth area. Outbreaks typically cause small blisters (cold sores) around the mouth but some cases can be much more severe (as here).
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