Vienna's central City Hall Square was transformed Saturday into a mythical world of pagan rites and fantastic spectacle as the city hosted its biggest annual party of the year.
The Food and Drug Administration is outlining its plan to end the nation's lifetime ban on blood donations from gay and bisexual men, a 32-year-old policy that many medical groups and gay activists say is no longer justified.
Cases of HIV have skyrocketed among injection drug users in a rural community in the Midwestern state of Indiana where 142 people have been diagnosed since the beginning of the year, officials said Friday.
The immune system may play a part in Alzheimer's disease, U.S. researchers have discovered, in a breakthrough which could lead to the development of new treatments for the most common form of dementia.
Real-time imaging in lab monkeys has pointed to the havens where HIV lurks after being beaten back by drugs, scientists said on Monday.
Two of four strains of the virus that can cause AIDS come from gorillas in southwestern Cameroon, an international team of scientists reported in studies published Monday in the United States.
For the first time, a study shows that a drug used to treat HIV infection also can help prevent it when taken before and after risky sex by gay men.
Some U.S. health insurance plans are discriminating against people with HIV by placing antiretroviral drugs in a high-cost category and forcing patients to pay more for coverage, researchers said Wednesday.
Women who use a specific type of injectable birth control have a slightly higher risk of HIV infection than those who take the pill, said a study Friday.
The human immunodeficiency virus (HIV) may lose its ability to cause AIDS over time as more people take anti-retroviral drugs to keep the infection at bay, researchers said Monday.