Study: Obesity Makes Flu Vaccine Less Effective

Obese individuals who get the flu shot still might not be protected against the flu, according to a new study.

Researchers studied antibody response in 74 people who received the flu vaccine during 2009-10. They first measured antibody response a month after the individuals received the vaccine, and then a year later. The obese subjects in the group saw a 40 percent or greater reduction in antibodies, compared to the 25 percent reduction in subjects at a normal weight.

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