A new evolutionary perspective on what's been a medical paradox: Why does the body use inflammation to regulate aspects of pregnancy when inflammation is also a big threat to pregnancy?
New genetic technologies are letting us look at flu evolution right where it starts: within individual people, while they're sick.
A few cancers vanish without any medical treatment. Researchers are studying these 'spontaneous regressions' to see if they can lead to new cancer treatments.
The immune system protects us from the constant onslaught of viruses, bacteria and other types of pathogens we encounter throughout life. But it can sometimes misbehave.