Most new cases of herpes are HSV1 from BJs (caused by coldsores on the lips). The good news is that the majority of adults have the HSV1 antibody, due to previous exposure, so won't get it (again).
Worldwide rates of HSV infection are between 65% and 90%. HSV1 is more common than HSV2 with rates of both increasing as people age. Rates of infection are determined by the presence of antibodies against either viral species.
In the US, 57.7% of the population is infected with HSV-1 and 16.2% are infected with HSV-2. Among those HSV-2 seropositive, only 18.9% were aware that they were infected.
It's probably safe to assume that the rates are higher amongst the more sexually active as these are averages of the whole population.
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