Herpes simplex viruses | |
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TEM micrograph of virions of a herpes simplex virus species | |
Scientific classification![]() | |
(unranked): | Virus |
Realm: | Duplodnaviria |
Kingdom: | Heunggongvirae |
Phylum: | Peploviricota |
Class: | Herviviricetes |
Order: | Herpesvirales |
Family: | Orthoherpesviridae |
Subfamily: | Alphaherpesvirinae |
Genus: | Simplexvirus |
Groups included | |
Cladistically included but traditionally excluded taxa | |
All other Simplexvirus species |
Herpes simplex virus 1 and 2 (HSV-1 and HSV-2) are two members of the human Herpesviridae family, a set of viruses that produce viral infections in the majority of humans.[1][2] Both HSV-1 and HSV-2 are very common and contagious. They can be spread when an infected person begins shedding the virus.
As of 2016, about 67% of the world population under the age of 50 had HSV-1.[3] In the United States, about 47.8% and 11.9% are estimated to have HSV-1 and HSV-2, respectively, though actual prevalence may be much higher.[4] Because it can be transmitted through any intimate contact, it is one of the most common sexually transmitted infections.[5]