Assertion: smallpox's virus | /r/ObjectUse | used as bioweapon
Facets:
Source sentences:
text: U.S. officials then decided to keep vials containing the virus so that scientists could use it to produce a safer smallpox vaccine, in case the virus ever escaped from the secured labs or was used as a bioweapon.
text: And there's also concern that the virus could be used as a bioweapon.