1 Swine Flu Shot Enough, Studies Find

One shot looks like enough to protect adults from H1N1 (swine) flu, researchers reported September 11. The Australian company CSL Ltd. found in a study that its vaccine would protect 75% to 96% of adults from swine flu with one shot. U.S. data released this week show similar results, the Associated Press (AP) reported. The U.S. study shows that protection begins 8 to 10 days after the shot, AP said. Both studies were published online by the New England Journal of Medicine. It’s also the time for seasonal flu shots. The new research means that people now will need two shots. Public health experts had feared that they would need three, including two for swine flu. The seasonal flu vaccine is available now. Swine flu vaccine is expected to arrive in doctor’s offices in mid-October.