Flu vaccine may work better in women
Women may develop stronger protection against the flu than do men following vaccination, concludes a study from the Stanford School of Medicine.
Researchers examined the effects of the flu vaccine on the immune responses of 53 women and 34 men, and found that women had a stronger immune response to the shot than did men. Scientists found that the flu shot was least effective in the men with the highest levels of testosterone—a hormone which is known to suppress inflammation connected to the immune system.
The results, published in the journal Proceedings of the National Academy of Sciences, add to previous research which has found that men and women have different levels of protection following a flu shot. Researchers said their study provides clues to how to improve the effectiveness of flu shots in men.