In a world first, US doctors have transplanted a kidney from one HIV-positive patient to another. The operation took place at Johns Hopkins in Baltimore, Maryland, with both patients said to be doing well.

Feminists have striven for decades to emancipate women sexually, but when it comes to casual promiscuity, the female of the species is still more straight-laced than the male. And evolution is to blame. Women are evolutionary programmed to regret one night stands, while men have evolved to regret not having more of them, a study suggests. “Women regret that they agree to a one-night stand more often than men. Men regret passing up the chance more than women,” says Prof Leif Edward Ottesen Kennair at the Norwegian University of Science and Technology’s (NTNU) department of psychology.

With inspiration from an ancient toy, researchers believe that the simple spinning mechanics of a whirligig could help in the diagnosis of malaria, HIV and other diseases around the world, according to a new study.

Drug treatments to suppress HIV could be driving up rates of syphilis by eliminating the 'fear factor', a new study has warned. Highly active antiretroviral therapy (HAART) can control viral load - making it virtually undetectable - and preventing or delaying the progression to AIDS.

Intarcia Therapeutics is developing implantable pump which holds six or 12 months’ supply of medicine.

This will be South Africa's largest and most advanced HIV vaccine clinical trial.

New vaccine trial in South Africa builds on previous RV144 study to bring in more effective prevention of infection.

A combination vaccine and immune system stimulant appears to suppress virus levels in tests on monkeys.

Scientists may have found a way for patients with HIV to keep the virus in check without having to take powerful drugs every day. But despite an early success in monkeys, they are scratching their heads over how, exactly, their experimental therapy works.

A vaccine against HIV will be trialed in South Africa later this year after meeting the criteria needed to prove it could help fight the epidemic in Africa.