JOHN BAVOSI / SCIENCE PHOTO LIBRARY JOHN BAVOSI / SCIENCE PHOTO LIBRARY
Artwork showing a cutaway section of human skin, through one of the vesicles of a cold sore infection due to Herpes simplex virus (HSV). At the base of the fluid-filled vesicle are multinucleated giant cells, epidermal cells infected with HSV with multiple nuclei (darkly stained). Close by, other epidermal cells show ballooning degeneration. HSV is one of the most common types of human virus parasites. Two types have been distinguished: type 1 (HSV-1) infection, which is generally associated with oral & central nervous infections and type 2 (HSV-2) involved in genital herpes infections & transferred through sexual activity.
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