Transmission
HSV-1 and -2 are transmitted by contact with an infectious area of the skin during re-activations of the virus. Although less likely, the herpes viruses can be transmitted during latency. Transmission is likely to occur during symptomatic re-activation of the virus that causes visible and typical skin sores. Asymptomatic reactivation means that the virus causes atypical, subtle or hard to notice symptoms that are not identified as an active herpes infection. Atypical symptoms are often attributed to other causes such as a yeast infection. HSV-1 is usually acquired orally during childhood, but may also be sexually transmitted. HSV-2 is primarily a sexually transmitted infection but rates of HSV-1 genital infections are increasing.
Both viruses may also be transmitted vertically during childbirth, although the real risk is very low. The risk of infection is minimal if the mother has no symptoms or exposed blisters during delivery. The risk is considerable when the mother gets the virus for the first time during late pregnancy.
Read more about this topic: Herpes Simplex Virus