Harvard Health Content API

When cancer patients are treated with radiation, it's possible that the therapy itself may cause new tumors to form in the body later. Canadian researchers published findings in 2014 finding no difference between groups of men treated with cancer or with surgery — but following up another decade later, there was a clear increase in risk.

Not all drug side effects are created equal: some are tolerable, some are dangerous –– and some may turn out to be surprisingly beneficial with weight loss and hair growth as superstar examples. Silver linings like these can lead to a new purpose for some medications.

If you’ve ever had food poisoning caused by Salmonella bacteria, you know it’s unpleasant but typically goes away within two to three days. You may not know that these bacteria sicken more than a million people in the US each year — and can be deadly for some. You can take steps to avoid getting sick.

It’s never easy for parents to talk to their teens about sex, so many are understandably hesitant to do so. But even if teens are not yet sexually active, it’s important for them to have accurate information about sexually transmitted infections to keep themselves safe and healthy.