HSV2, also known as Herpes simplex virus 1 or HHV-2, is an infectious virus known for causing causing genital herpes in humans. There are an estimated 417 million people worldwide under the age of 50 that are infected with HSV-2. The virion is enveloped and spherical, with a linear double stranded DNA genome encoding at least 74 genes. HSV-2 is transmitted sexually from shedding of the virus in the genital tracts.