Obesity may harm the body's ability to fight recent flu infections.
They represent cases from the time swine flu was first identified in April through mid-January - the first nine months of the pandemic.
Up to 80% of children under 10 who got a first dose are overdue for a second in some states.
You may think you've avoided catching the flu, but we're actually heading into potentially the worst period to get the seasonal or H1N1 flu.
More hugs, fewer bugs. Holiday visits have become safer for grandparents thanks to a childhood vaccine that has dramatically curbed infections spread by kids, a new study finds.
Health officials are recalling hundreds of thousands of doses of H1N1 flu vaccine after tests indicated they may not be potent enough to protect against the virus.
The nasal mist form of the vaccine will be available at pharmacies; it is designed for people aged 2 to 50 years old.
Vaccines are available today in the District and Fairfax County, Virginia for select groups.
H1N1 flu has been linked to 30 deaths in Virginia.
Canadian doctors have been advised not to use a batch of H1N1 flu vaccine while authorities investigate reports of allergic reactions among recipients.
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