Assertion: variola virus | /r/CapableOf | infect human
Facets:
value: in nature
type: LOCATION
value: never again
type: TEMPORAL
Source sentences:
text: Variola virus infects only humans in nature, although primates and other animals have been infected in a laboratory setting.
text: An unusual property of the smallpox virus is that it only infects humans and not animals and insects
text: Variola virus infects only humans and can be easily transmitted from person to person via the air.
text: Even if variola virus never again infects humans, there are other poxviruses that can cause serious human disease.
text: Variola virus infects only humans in nature, although primates and other animals have been infected in a laboratory setting.