You cannot get Lyme disease if you come into contact with someone’s sneeze, cough, or blood. Learn when it is contagious and ...

Until very recently, this microbe-mediated immune education was thought to be initiated when a newborn baby leaves the relatively sterile environment of the uterus and is seeded with its mother’s ...

Honey contains C. botulinum bacteria, which can produce a toxin in a baby's large intestine, leading to a rare but serious illness known as "infant botulism." Following is a transcript of the video.

A fetus can also be infected, because listeria bacteria can cross the placenta. For these reasons, the C.D.C. recommends that people in high-risk groups avoid foods commonly contaminated with ...