Some pathogens are much more dangerous to handle than others, which has led to their classification for laboratory purposes into categories. Category 4, the most dangerous, contains those...
Today we have a pretty good grasp of what causes illness. We know about infections, carcinogens, pollution, genetics, anatomical abnormalities and the consequences of a poor diet. We also have...
Influenza is a nasty illness. It isn’t just a bad cold. This viral infection kills up to half a million people in the world every year. And that’s in a good year. In a bad year, like 1968, the Hong...