contagious disease

It's only early December, but already there's been some nasty norovirus outbreaks in the U.S. One was bad enough to close an entire school. Another hit 400 people at the U.S. Air Force Academy. In response, some bits of wisdom (and humor) about this dreaded stomach bug.
The flu reminds us that as social animals, pathogens can kill both individuals and large segments of our population. A study sheds some light on how ants, social insects, cope with infections that endanger their colony.