Women rule! Apparently we're champions when it comes to the flu.

Stanford University researchers discovered, as CBS reports, a connection between certain genes that are "affected by testosterone and antibody responses to a flu vaccine." Lower levels of testosterone make it easier for women to reap the rewards of the flu shot. Woohoo!
They found that in men with weak responses, those same genes were involved in the production of certain fats in the body.

And the men with the weakest responses showed a higher level of testosterone.

Women and men with lower levels of testosterone had a better response to the vaccine.
So the next time you catch a flu, know that the flu shot might work really well for you!