A new report from Women in Global Health looks at how much ground was lost — and what the impact is on health care.

PEPFAR is the "most amazing thing in the history of HIV," says Dr. Sharon Lewin, president of the International AIDS Society. Bush himself came to Washington this month to urge reauthorization..

Sikhulile Moyo led the team that first identified omicron — and was dismayed by the world's reaction — blaming and blacklisting African nations. He's now a bit more optimistic.

We've heard for months that chances of catching SARS-CoV-2 outdoors are far less than indoors. Is that still true with highly contagious omicron strains? And if it is, what can you do to stay safe?

"Ventilation is the way forward," says infectious disease doctor Abraar Karan of Stanford. Here's how to get better air flow at home, in schools and offices — even in gyms — to stave off COVID.

People who catch COVID may feel as if they won't get it again, at least not for a long time. Their immune system should be primed to fight it off in the future. Right? Well, let's see.

With COVID case counts falling and rising, testing is critical. But how many days after exposure should I test? And if I have symptoms but test negative, might the test not be accurate?

A new study documents that infected hamsters, imported from the Netherlands, passed the virus on to humans. Previously only minks had been identified as a source of animal-to-human transmission.

Findings from a new study help answer questions about why some people get more severe and transmissible HIV than others — and serve as a reminder that viruses don't always weaken over time.

We answer key questions about COVID tests: What types are there? Should you self-test right after exposure to someone with COVID? And what should you do if you test positive?

Remains of thousands of people are still being recovered and laid to rest at a nearby memorial to the 1994 mass slaughter.

In honor of World Toilet Day, here is a sampling of toilet etiquette signage. It's hard to argue with advice like: "Please use a toilet finely."

The full impact of this potentially fatal disease is unknown. A new report calculates the places where animals and people are at risk.

The ancient disease is still around — and killed a couple in Mongolia just this month. Here's a look at the history — and persistence — of the plague.

A report from Johns Hopkins University and Human Rights Watch finds an alarming decline in the quality of health care across the country.

In theory no one should die of cholera. Yet 90,000 people die each year from the disease, which is surging at a historic pace in Yemen and surfacing in Mozambique in the wake of Cyclone Idai.

That's why public health officials are urging people to "know your status." But if they learn they are HIV positive, there isn't always a clear path to treatment.

Using toilets is not always intuitive. That's when a sign or two can be helpful — and sometimes hilarity-inducing.

Two new studies offer unexpected insights — and solutions — into the problem of spousal abuse.

Researchers are proposing the creation of a refrigerated Noah's ark for beneficial human bacteria-- like the Global Seed Vault.