swine flu

Heat Blamed For Spray Vaccine's Failure Against Swine FluThe makers of the nasal spray version of the flu vaccine say now they know why it has failed to protect young U.S. children against swine flu — fragile doses got too warm.
CDC: 5-Fold Increase Of Cases Involving New Swine Flu StrainOfficials say there's been a five-fold increase of cases of a new strain of swine flu that spreads from pigs to people.
CDC Issues Fair Warning About Pig Flu