In the United States, nearly 20 million cases of new STD infections are reported each year, reports Live Science. Since infections can persist for a long time, and because some victims are not even aware they have a disease and can easily spread it to others.
Based on data from 2008, the Centers for Disease Control and Prevention, the eight most common sexually transmitted diseases are: chlamydia, gonorrhea, hepatitis B virus (HBV), genital herpes, HIV, human papillomavirus (HPV), syphilis and trichomoniasis.
About 50.5 million current infections are in men while 59.5 million are in women, for a total of 110 million Americans with STDs at any given time.
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