Accurate blood tests mean more groups can give blood safely, experts say.
The company initially said it didn't want to "incentivise inappropriate use" of the pill.
The proposals are criticised for "disproportionately affecting" poorer families.
The secret to an HIV vaccine may be in a cow's tummy, US researchers say.
They include hearing loss, smoking, and not finishing secondary education, a study says.
One million people died from Aids last year, according to UNAids.
A study suggests if those with undiagnosed problems were included, the rate would be much higher.
England's health regulator says a high proportion of people should be cared for closer to home.
Decision not to vaccinate boys against a cancer-causing sexually transmitted infection attracts fierce criticism.
Countries covering two thirds of the world's population now have measures in place to encourage people to stop smoking.