The CDC estimates that there were 26 million new STDs in 2018 in the United States, with almost half of new STDs among youth aged 15 - 24 years.
An estimated 38 million individuals worldwide were living with HIV at the end of 2019. In the United States, there were an estimated 1.2 million individuals living with HIV, with approximately 14% being unaware of their HIV status.
Most prevalent in the western Pacific region and in Africa, where at least 6% of the adult population is infected. In the United States, a total of 3,322 cases of acute hepatitis B were reported to CDC in 2018, but actual estimates were closer to 21,600.
In 2018, there were 3,621 new cases of hepatitis C reported to CDC. However, actual estimates are closer to 50,300 new cases during 2018.
In 2018, there were 115,045 new syphilis cases reported in the United States. In 2019, this increased to 129,813 reported cases of all stages of syphilis, including 38,992 cases of primary and secondary syphilis, which is the most infectious stages of the disease. In 2019, there were 1,870 reported cases of congenital syphilis (when the fetus acquires syphilis before birth).
Over 1.7 million cases of chlamydia were reported to the CDC in 2018, with an increase to over 1.8 million reported cases in 2019. However, actual annual chlamydia cases are estimated to be closer to 2.86 million.
There were 583,405 cases of gonorrhea reported to the CDC in 2018, and 616,392 reported cases in 2019. More than half of all infections were estimated to be resistant to at least one antibiotic in 2019.
As of 2018, there are an estimated 2.6 million individuals with trichomoniasis in the United States.