Background: The search for the elusive cure for Aids

Since its was first discovered in 1981, scientists have made strenuous efforts to treat and prevent the disease

Mass testing plan to tackle Aids

Strategy could subject people to potential medical harm for public good, rather than individual benefit

The US is alive with new fitness trends, many of which will be making their way over here. Alexandra Starr tries out three of the best

Merrill Goozner: Obama hasn't even taken office, but US drug companies are already starting their campaign against healthcare reform

Abigail Jones: Teenagers may see a lot of nooky on popular TV programmes, but they should still learn about safe sex from their parents

Sasha Abramsky: Why should Obama bother wooing union leaders and their members? Without them, his plans for social reform won't work

Research shows that neck arteries of obese children were similar to those of a 45-year-old

HIV set to spiral out of control unless we act now, says development minister

Emine Saner: While many people dread the appearance of grey hairs, Obama is nothing if not an optimist

Zoe Williams: If 10-year-olds fixated on body image worry us, we need to address the adult culture they grow up in