Is this proof that man flu actually exists?

UK scientists say some viruses have evolved to cause less severe diseases in women than in men - possibly providing evidence that “man flu” actually does exist.

They hypothesise that women can help viruses spread in ways men can't - through pregnancy, birth and breastfeeding - so it makes evolutionary sense for the pathogen to keep women healthier.

This challenges the age-old assumption that women simply have a stronger immune system than men.

Francisco Úbeda and Vincent Jansen provide an alternative explanation. They show that pathogens can spread

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