Herpes simplex virus infection: cold sores on a young woman's upper lip and right cheek. The Herpes simplex viruses are regarded as being the most common human virus parasites. Two types have been distinguished. Type 1 (HSV-1) infection used to associated with most oral & central nervous infections,with Type 2 (HSV-2) involved in genital herpes infections. This distinction is no longer clear-cut,due to a supposed increase in oral sexual activities. HSV-1 infection commonly occurs in childhood. After the primary infection,the virus persists in a latent state to re-appear & cause recurrent cold sores. side view | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / St. Bartholomew's Hospital |
Bildgröße: | 5070 px × 3556 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |