Assertion: polio | /r/HasProperty | caused
Facets:
value: due to small rna viruses
type: CAUSE
Source sentences:
text: Though rare, polio has been caused when people are immunized with the live polio vaccine.
text: There have been rare cases where polio has been caused by being vaccinated with a live version of the polio virus.
text: Polio is caused due to small RNA viruses, which are members of the Picornavirus family.