Swine flu has killed nearly 4,000 in us
Swine flu is thought to have killed nearly 4,000 people in the United States, including more than 500 children, health officials said after a new counting method yielded an estimate six times higher than the last.
Swine flu has infected 4,379 people in 29 countries, the World Health Organisation said on Sunday, increasing its count by almost a thousand in a day.