| Believe her until you have real evidence to not believe her. Herpes may not be the evidence. A person can be infected with herpes for years — even a lifetime — without knowing it. That's why it is possible for herpes to break out in someone whose partner has been sexually faithful. The infection could have been there before they met. A weakened immune system or other stress can set off an outbreak long after infection occurred.
At least 45 million U.S. women and men have herpes. One million new cases are diagnosed every year. Millions of others go undetected. With so many invisible infections being passed around, herpes has become one of the common risks of being sexually active. Of course, folks who have active herpes sores shouldn't have sex with anyone else until seven days after the sores are totally healed.
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