Assertion: smallpox's virus | /r/CapableOf | infect cow
Facets:
value: at the time
type: TEMPORAL
Source sentences:
text: Sleuthing through historical records led some scientists to speculate that another virus called horsepox, known to infect both horses and cows, may have been vaccinia virus’ ancestor.
text: What they found instead was that it was 99.7 percent horsepox, a virus that was also known to infect cows at the time that Edward Jenner was doing his experiments.