Published in Vaccine Weekly, August 20th, 2008
The study of more than 3,500 Group Health patients age 65 found no link between flu vaccination and risk of pneumonia during three flu seasons. "This suggests that the flu vaccine doesn't protect seniors as much as has been thought," said Michael L. Jackson, PhD, MPH, a postdoctoral fellow at the Group Health Center for Health Studies.
"Ours is by far the largest case-control study of flu vaccine in the elderly," Jackson added. This kind of study compares "cases" with "controls." The cases...
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