Smallpox is a contagious disease caused by the variola virus, one of the Orthopoxviruses that causes skin eruption and marked toxemia. The disease was officially declared eradicated in 1979 following intensive vaccination campaigns.
Infectious diseases [BR:br08401]
Infections caused by dsDNA viruses
Human diseases in ICD-11 classification [BR:br08403]
01 Certain infectious or parasitic diseases
Viral infections characterised by skin or mucous membrane lesions
Infections due to poxvirus