The AIDS virus has hideouts deep in the immune system that today’s drugs cannot reach. Now scientists finally have discovered how HIV builds one of those fortresses — and they are exploring whether a drug already used to fight a parasite in developing countries just might hold a key to break in.

AIDS patients who take effective retroviral drugs do not pass on the virus even through unprotected sex, Switzerland’s state commission on the disease claimed on Wednesday.

Researchers dedicated to finding a gel or cream that could work invisibly to protect women from AIDS the way a condom does said on Wednesday they got permission from Pfizer Inc. to use its newest HIV drug.

The majority of Taiwan’s male homosexuals surveyed recently in a Taiwan AIDS Foundation study do not use condoms while having oral sex with their partners, indicating insufficient awareness of HIV/AIDS among the gay community, the Department of Health (DOH) said Saturday.

Health officials on Sunday began distributing millions of condoms to fight the spread of AIDS and other sexually transmitted diseases during Brazil’s five-day Carnival.

Britain is becoming socially more liberal, according to one of the country’s most comprehensive surveys, with seven in 10 seeing nothing wrong with pre-marital sex and views on homosexuality also relaxing.

A new study showing an increased risk of blood clots among women using a contraceptive skin patch prompted the U.S. Food and Drug Administration on Friday to add that finding to the drug’s label.

A drug-resistant strain of potentially deadly bacteria has moved beyond the borders of U.S. hospitals and is being transmitted among gay men during sex, researchers said on Monday.

A “substantial minority” of 15-year-olds have had sexual intercourse, according results of a survey of 33,943 adolescents from 24 European and North American countries.

Many women in Singapore have a low sex drive, or suffer from hypoactive sexual desire disorder, a published report said Thursday.