A woman who caught pneumonic plague in Colorado last summer likely contracted it from her friend or his dog. Antibiotics limited the outbreak to four people and cured them.
Shifts in climate in the Middle Ages likely drove bubonic plague bacteria from gerbils in Asia to people in Europe, research now suggests. Rats don't deserve all the blame.
Tiny patches of Tanzanian farmland contain more rats than do nearby forests. These rats are more likely to carry the bacteria that cause the plague in humans.
The city fathers didn't understand the plague they faced in the Middle Ages. Yet they improvised brilliantly. A new paper explains how their mindset is a model for how to face an unknown threat.