Another benefit of exercise: researchers have known that it boost the immune system, and now there is evidence that it makes flu shots (and perhaps other vaccines?) more effective.
Those volunteers who had exercised after being inoculated, it turned out, exhibited “nearly double the antibody response” of the sedentary group, said Marian Kohut, a professor of kinesiology at Iowa State who oversaw the study, which is being prepared for publication. They also had higher blood levels of certain immune system cells that help the body fight off infection.
via Scope – medical blog – Stanford University School of Medicine.