Experts say most people should not take aspirin for disease prevention without first talking to a doctor because there are risks. Some researchers have even said that some people get little or no protection from aspirin. So research continues on one of the oldest and most widely used drugs in the world.

This Science in the News was written by George Grow. Our producer was June Simms. I'm Mario Ritter.

And I'm Avi Arditti. Join us again next week for more news about science on the Voice of America.