Health

Over the past few decades, one of the most perplexing questions in global health is how to stop HIV.

There have been campaigns involving condoms, abstinence and even the circumcision of all men younger than 46. But one relatively new strategy, called treatment as prevention, is causing quite a buzz.

The most heated part of the fight between the Obama administration and religious groups over new rules that require most health plans to cover contraception actually has nothing to do with birth control. It has to do with abortion.

Specifically, do emergency contraceptives interfere with a fertilized egg and cause what some consider to be abortion?

This year's flu vaccine appears to be doing a unusually poor job of protecting the elderly, federal health officials reported Thursday.

Overall, this year's flu vaccine appears to be only about 27 percent effective for people ages 65 and older, the Centers for Disease Control and Prevention reports in this week's Morbidity and Mortality Weekly Report.