For centuries, scientists and historians have wondered where the Black Death — the deadliest pandemic in recorded history — came from. New research sheds light on the ancient disease.
That's when a vaccine for plague was invented — and authorities began to consider requiring proof of vaccination before visiting pilgrimage sites in India. The debate has raged ever since.
The pope says the COVID-19 pandemic is exposing hypocrisy and misplaced priorities in the modern world, as he calls on people to remember their shared humanity.
An estimated 2,000 people fell ill and more than 170 died. But the latest news is that cases are dwindling.
A bad outbreak is spreading in Madagascar. We checked in with a virologist and outbreak response specialist Dr. Daniel Bausch to see what's up.
The number of cases has prompted a ban on public gatherings — and concern from the World Health Organization. The disease is spreading in cities and has claimed 30 lives so far.
Ten thousand years ago, many of our deadly human diseases didn't exist. What happened?
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.