The herpes virus increases both susceptibility to and transmissibility of HIV infection according to a new study. 'Heterosexual intercourse is usually not very efficient for transmitting HIV but the efficiency of heterosexual transmission nearly triples in the presence of herpes simplex virus type 2 (HSV-2)' said lead author Don Des Jarlais professor of psychiatry and preventive medicine at Mount Sinai Beth Israel in the US. A person usually gets HSV-2 through sexual contact. HIV and its transmission has long been associated with injecting drug use where hypodermic syringes are used to administer illicit drugs. However the new study showed that