Sexually transmitted diseases (STDs) are caused by sexually transmitted infections (STIs). They are spread mainly by sexual contact. STIs are caused by bacteria, viruses or parasites. A …

This common sexually transmitted infection often causes no symptoms. Learn more about treatment, prevention and possible complications.

Mar 12, 2024 · Sexually transmitted diseases are infections spread mainly by contact with genitals or bodily fluids. Also called STDs, STIs or venereal disease, sexually transmitted infections are …

Aug 22, 2025 · Find out more about this rare viral infection, the possible symptoms in humans, treatment options and how to prevent getting or spreading the virus.

Mar 24, 2023 · No, the virus that causes Ebola is not transmitted through the air. Unlike a cold or the flu, the Ebola virus is not spread by tiny droplets that remain in the air after an infected …

Jul 2, 2024 · Hepatitis A is a contagious liver infection caused by a virus. Learn how the disease spreads and what you can do to prevent or treat it.

Jun 17, 2025 · A cytomegalovirus (CMV) infection is a condition caused by a common virus. The CMV virus stays in the body for life after infection. CMV spreads from person to person …

This common sexually transmitted infection (STI) can lead to serious health problems if left untreated. Learn more about symptoms, treatment and prevention.

Vivien Williams: Syphilis is a sexually transmitted infection caused by the bacterium Treponema pallidum. Dr. Stacey Rizza, an infectious diseases specialist at Mayo Clinic, says syphilis …

Nov 30, 2022 · The most common cause of mononucleosis is the Epstein-Barr virus, but other viruses also can cause similar symptoms. This virus is spread through saliva, and you may …