A doctor sitting at a desk having a conversation with a woman.

How many people are affected by or at risk for a sexually transmitted disease (STD) or sexually transmitted infection (STI)?

The Centers for Disease Control and Prevention (CDC) estimates nearly 20 million new cases of gonorrhea, chlamydia, and syphilis (infections that are required to be routinely reported to public health officials) occur each year in the United States. About one-half of these infections occur in young people 15 to 24 years of age.1

State and local agencies are not routinely required to report data to CDC for certain other infections, such as human papillomavirus, herpes simplex virus, and trichomoniasis, so total STD/STI numbers are probably much larger.

HIV/AIDS is one of the most well-known of the STIs even though it is not the most common. Recent data from CDC indicate that more than 1.2 million Americans have HIV:2

  • One in eight Americans with HIV is unaware that they have the virus.
  • Approximately 50,000 Americans become infected with HIV each year.
  • In the U.S., 13,712 people with AIDS died in 2012.

More information about the number of people who test positive for HIV/AIDS in the United States and the differences in these numbers for individuals from different cultures and backgrounds is available from CDC: HIV in the United States: At a Glance.

Citations

  1. Centers for Disease Control and Prevention. (2015). Reported STDs in the United States 2014: National data for chlamydia, gonorrhea, and syphilis. Retrieved December 23, 2015, from http://www.cdc.gov/std/stats14/std-trends-508.pdf (PDF – 161 KB)
  2. Centers for Disease Control and Prevention. National Center for HIV/AIDS, Viral Hepatitis, STD, and TB Prevention. Division of HIV/AIDS Prevention. (2017). HIV in the United States: At a glance. Retrieved September 9, 2017, from https://www.cdc.gov/std/stats14/std-trends-508.pdf (PDF – 182 KB)

How many people are affected by or at risk for a sexually transmitted disease (STD) or sexually transmitted infection (STI)?

What are the symptoms of sexually transmitted diseases (STDs) or sexually transmitted infections (STIs)?

What causes sexually transmitted diseases (STDs) or sexually transmitted infections (STIs)?

Why are sexually transmitted diseases (STDs) and sexually transmitted infections (STIs) of particular concern for pregnant women?

What are some types of and treatments for sexually transmitted diseases (STDs) or sexually transmitted infections (STIs)?

How do health care providers diagnose a sexually transmitted disease (STD) or sexually transmitted infection (STI)?

Is there a cure for sexually transmitted diseases (STDs) and sexually transmitted infections (STIs)?

What are the treatments for sexually transmitted diseases (STDs) and sexually transmitted infections (STIs)?

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