Causes of Genital Herpes
The key cause of genital herpes is HSV-2 (herpes simplex virus-2). A person may be infected with HSV-2, but not show any symptoms. Approximately 30-50% of people infected with HSV-2 may be asymptomatic. Even if someone does not show any symptoms, they can pass on the infection . This includes people who have a known herpes infection, but who currently do not show any symptoms. It is recommended that you use condoms to protect yourself from genital herpes, but you should also be aware that a condom may not cover all the sores, and contact with any sores can result in becoming infected.
HSV-2 is quite common in the USA. About one or two million infections and 600,000-800,000 clinical cases are reported in a year. About 40-60 million people are infected with it.