A highly contagious disease caused by a type of poxvirus; symptoms usually include fever, severe back pain and a blistery-like rash. [Smallpox is transmitted from person to person by infected aerosols and air droplets.]
Source: Medical Center of the University of Chicago
Glossary - Travel Medicine
Smallpox is one of the most devastating diseases known to humanity. For centuries, repeated epidemics swept across continents, decimating populations and changing the course of history but in 1980 the world has been declared free of smallpox thanks to consequent vaccination programs.
Source: Greenfacts, based on WHO
Smallpox
Español: Viruela
Français: Variole
Nederlands: Pokken