medical studies

Researchers do not know what causes people with the condition now known as ME/CFS to suffer debilitating exhaustion and other symptoms that make many everyday activities all but impossible.

Medical breakthroughs that were covered by newspapers were often later disproved by more comprehensive research, a study finds. That's a problem for scientists and journalists.

After retiring hundreds of research chimpanzees in 2013, the National Institute of Health said that 50 remaining chimps would no longer be used for medical studies.