NEW STUDY: 

SWIMMING RATS DON'T GET SICK

The question is, how much are we like rats? Right away, a few people come to mind ...although they don't seem particularly healthy. Anyhow, here's more proof that exercise is good for you, in this case improving your immunity and helping you fight off diseases....

https://www.roadbikerider.com/latest-rbr-newsletter-2016/213-issue-no-701/1885-vigorous-exercise-can-strengthen-your-immunity