It extinct because of vaccination, the last natural outbreak of smallpox in the United States occurred in 1949. In 1980, the World Health Assembly declared smallpox eradicated (eliminated), and no cases of naturally occurring smallpox have happened since.
DodoBirds:
The dodo was extinct by 1681, the Réunion solitaire by 1746, and the Rodrigues solitaire by about 1790. The dodo is frequently cited as one of the most well-known examples of human-induced extinction and also serves as a symbol of obsolescence with respect to human technological progress.
IndianCheetah:
Research showed that there were at least 230 cheetahs in the wild between 1799 and 1968. It is the only large mammal to become extinct since Independence. Hunting, diminishing habitat and non-availability of enough prey - black buck, gazelle and hare - led to the extinction of the cat in India.
Wood'sCycad:
Encephalartos woodii, Wood's cycad, is a rare cycad in the genus Encephalartos, and is endemic to the oNgoye Forest of KwaZulu-Natal, South Africa. It is one of the rarest plants in the world, being extinct in the wild with all specimens being clones of the type.
SaintHelenaOlive:
St. Helena olive disappeared from the wild in 1994 and became extinct in 2003 when the cultivated seedlings and cuttings succumbed to fungal infections.
Answers & Comments
Small Pox Virus:
Dodo Birds:
Indian Cheetah:
Wood's Cycad:
Saint Helena Olive: