disease
Smallpox
Smallpox is a contagious disease caused by a virus that’s no longer found in nature. For centuries, smallpox killed millions of people around the world. But thanks to global immunization programs, the deadly infectious disease was wiped out in the late 1970s. Today, scientists keep only a small amount of the virus alive under tightly controlled conditions in the U.S. and Russia for medical research.
Posted August 20, 2022 by Anusha ‐ 3 min read