WHO says new bird strain is "one of most lethal" flu viruses
A new bird flu strain that has killed 22 people in China is "one of the most lethal" of its kind and transmits more easily to humans than another strain that has killed hundreds since 2003, a World Health Organization (WHO) expert said on Wednesday.
Taiwan man contracts H7N9 bird flu, first outside mainland China
A 53-year-old Taiwan businessman has contracted the H7N9 strain of bird flu while travelling in China, Taiwan's Health Department said on Wednesday, the first reported case outside of mainland China.
Many Americans breathing cleaner air
Although many Americans are now breathing cleaner air, others are living in cities that are more polluted than they were a decade ago, a new report shows.
When cheeseburger = walking, will we eat less?
Would you eat a double cheeseburger if you knew it took two hours of walking to burn it off? Participants in a new study said, hmm, maybe not. The researchers say that exercise-based labels could do a better job than calorie counts at steering people to healthful choices.