DR P. MARAZZI / SCIENCE PHOTO LIBRARY DR P. MARAZZI / SCIENCE PHOTO LIBRARY
Herpes simplex infection. Close-up of a sore on the hand of a 7-year-old boy caused by Herpes simplex type 1 (HSV-1) infection. Herpes simplex usually infects the mouth area, where it causes cold sores. However, it can affect any area of skin of mucous membranes.
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