Study suggests at least 45 minutes of daily activity necessary to lower risk by 20 percent

Findings may be due to differences in health care options, researchers suggest

Duodenoscopes used at 2 Los Angeles hospitals carried drug-resistant 'superbug'

Study suggests at least 45 minutes of daily activity necessary to lower risk by 20 percent

Findings may be due to differences in health care options, researchers suggest

Duodenoscopes used at 2 Los Angeles hospitals carried drug-resistant 'superbug'

High-power workouts improved blood vessel function, researchers say

Study found those without heart problems faced higher chances of heart trouble after non-cardiac operations

Study suggests about 57 percent of hospitalizations for flu-related pneumonia might be prevented

Further testing of all children with suspicious injuries could minimize misdiagnoses