Assertion: smallpox | /r/HasProperty | declared
Facets:
value: thanks to a worldwide effort
type: CAUSE
Source sentences:
text: Thanks to a worldwide effort to wipe out the disease, smallpox was declared officially eradicated in 1980, after the last natural occurrence of the disease happened in Somalia in 1977, and the last death from the disease occurred due to a laboratory accident in England in 1978, according to the World Health Organization.
text: This vaccine was used until 1951 when smallpox was declared officially eradicated in Mexico.