The actor announced he has been HIV positive for years. — -- The announcement by actor Charlie Sheen that he is HIV positive is drawing attention to the virus that in recent years has become ...

What criteria or characteristics would you use to group living things versus nonliving things? Scientists have grappled with this question for years, and the debate is still ongoing in the scientific ...

As the HIV virus glides up outside a human cell to dock and possibly inject its deadly cargo of genetic code, there’s a spectacularly brief moment in which a tiny piece of its surface snaps open to ...

For over three decades, HIV has played an elaborate game of hide-and-seek with researchers, making treating—and possibly even ...

Researchers say they’ve taken a major step toward finding a cure for HIV. As The Guardian reports, scientists at the Peter Doherty Institute for Infection and Immunity in Melbourne found a way to make ...