Do you always practice safe sex? Or has the fear of AIDS --among other STDs -- diminished?

Researchers studied 2,000 women in Botswana and South Africa

A Nevada public health group cuts ties with a church that supports a key backer of Uganda's notorious legislation

Trump traveled to a fundraiser after Hope Hicks already tested positive and he was "feeling poorly"

"The president and the vice president have since tested negative for the virus, and they remain in great health"

A bacterium called Mycoplasma genitalium, or Mgen, can cause inflammation, miscarriage, and even infertility

"We still have much more to learn about the intricacies of HIV infection," an NIH representative said of the result

Daily antiviral pills for treating COVID-19 might be available by late fall or winter

Researchers have routinely dismissed the idea that the procedure can stem the spread of HIV. That may be about to change.

Is homophobia in the black community fanning the flames of HIV infection among African-Americans, the hardest-hit population outside sub-Saharan Africa?

It's not like we're dying to give blood, or that blood banks will run dry. But here's what the ban on gay men means

Are advertisements for home HIV tests selling false hope?

Charlie Sheen's dubious doctor gets a boost from the "Real Time" host, whose skepticism extends to modern medicine

Medical experts say the "super strain" of HIV found in a New York man is probably not so super after all.

A vaccinated reader cares for a child with COVID; the reader now has symptoms too. Are negative tests ever wrong?