A two-drug cocktail injected every month or two may be just as effective as a daily pill at keeping the AIDS virus under control, said a study Monday that promised relief for millions.

More than 600,000 people are expected to contract cholera in Yemen this year, the International Committee of the Red Cross warned Sunday as the war-torn country's healthcare system faces collapse.

"When you come down, you think: 'Oh God, how many people have I had sex with this weekend?'", says 30-something Briton James Wharton, recalling the anxiety that gripped him after a chemsex binge.

One third of dementia cases can be prevented with some basic lifestyle changes and better education during childhood, a study published in The Lancet said Thursday.

AIDS claimed a million lives in 2016, almost half the 2005 toll that marked the peak of the deadly epidemic, said a UN report Thursday proclaiming "the scales have tipped".

Not only are new HIV infections and deaths declining, but more people than ever are on life-saving treatment, according to data published ahead of an AIDS science conference opening in Paris on Sunday.

An Israeli who developed an unorthodox model for treating mental trauma and preventing post-traumatic stress disorder during his years in the military is now sharing it with first responders in other countries.

An angry President Donald Trump railed Tuesday against dissenters in his party who dashed his months-long effort to dismantle Barack Obama's landmark health care law.

The United Nations said Thursday it will ask countries to voluntarily hand over $40.5 million remaining from the budget of the soon-to-close mission in Haiti to help victims of cholera there.

Pakistan will raise the rate of contraception use to at least 50 percent within the next three years, the health minister has said, in a bid to help control its fast-growing population.

International donors must step up to prevent a cholera epidemic in war-torn Yemen from producing full-blown famine among hundreds of thousands of people, a U.N. official said Tuesday.