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.
Fifty percent of new infections occur in young people from ages 15-24 and gonorrhea is the most commonly reported STD in that age group.
Gonorrhea is the second most commonly reported STD in the United States.
The most commonly reported infection is chlamydia. But since many who are infected don’t show symptoms, the number could be far higher than the 1.4 million in 2012, a rate of 457 cases per 100,000 people.