Forty years ago today (8 May 1980), the World Health Organization officially declared smallpox eradicated.
Variola virus is classified as class A of potential biological weapons.
Researchers comparing that genetic material of the virus from the mummy with modern smallpox samples and found them to be quite similar. They were also able to trace the newly unearthed strains’ back to about 1588.
A series of 13 videos about the history of medicine and smallpox.