Smallpox has been the most devastating diseases in the world. It’s well-known cause is a virus named Variola. WHO (World Health Organization) have had a significant hand in smallpox eradication following its global immunization campaign.
Smallpox has been the most devastating diseases in the world. It’s well-known cause is a virus named Variola. WHO (World Health Organization) have had a significant hand in smallpox eradication following its global immunization campaign.