Months after safety advocates embraced wearing helmets during tornadoes — the Centers for Disease Control and Prevention has issued guidelines on the practice. The CDC says there's not yet enough scientific evidence to fully endorse the idea. But the agency is warming up to people donning helmets when severe weather threatens.
Since a horrific outbreak of tornadoes killed more than 250 people last year in Alabama, safety advocates have been on a crusade.
Gilead Sciences' Truvada is a step closer to being approved as a way to prevent HIV infection.
Credit Paul Sakuma / AP
In what could mark a watershed in the fight against HIV/AIDS, a panel of experts recommended that the Food and Drug Administration give a green light to a pill that can cut the risk of infections.
The daily pill, Truvada, made by Gilead Sciences, combines two medicines that inhibit the reproduction of HIV. It's already approved as a treatment for HIV, but its use could soon expand to include protection of uninfected people.
Nurse Susan Peel gives a whooping cough vaccination to a high school student in Sacramento, Calif. The whooping cough vaccine given to babies and toddlers loses much of its effectiveness after by the time people reach their teens and early adulthood.
Washington state is in the midst of a whooping cough outbreak. The state has more than 1,100 confirmed cases so far this year — that's 10 times as many as this time last year, and health officials fear the number may rise.
The state is desperately trying to raise awareness of the epidemic. Take this public service announcement featuring a mother whose baby contracted the disease.