Students of American history learn that European explorers, conquerors, and settlers brought diseases that ravaged the Americas in the 14th and 15th centuries. However, the absolute devastation those pathogens wrought wa...

That’s a very succinct and understandable way to explain what your immune system is doing to you. If you ask me, it’s a fairly decent tradeoff for not dying of the flu or an ingrown hair. A little Benedryl sh...

This map, interactive at the site, shows the vacci...  ...r 50%. That means that there is insufficient herd immunity at these schools, and children can contract these...  ...sk, because some vaccines take years to gain peak immunity , and even then it’s not 100%. Being vaccina...  ...cinate as many childre...

The last thing you want to do is expose a wound, e...  ...fection they way you'd think -they have a natural immunity in their blood. Chemists in Louisiana found that...

A team of doctors and medical researchers at the University of Pennsylvania tried a bold new experiment on three leukemia patients who seemed to have no hope left. One of them was 65-year-old William Ludwig. Doctors rem...