Grown men have a reputation for immediately turning into GIANT BABIES when they get sick.

And according to a new study . . . that’s totally JUSTIFIED.

Researchers in Canada found that flu symptoms really DO hit men harder than they hit women.

Why?  They found that women’s immune systems do a better job of fighting viruses and producing antibodies than men’s . . . and it seems to be connected to their extra estrogen.

And this could all go back to evolutionary biology.  Early men needed to be bigger and stronger to survive . . . so it was more important for their bodies to produce extra testosterone and not bother with making enough estrogen to fight off viruses.