Assertion: pathogen's virulence | /r/RelatedTo | durability
Facets:
value: in the external environment
type: LOCATION
value: positively
type: MANNER
Source sentences:
text: Each of these hypotheses has been evaluated and in each case the expected association occurred: virulence is positively associated with vector-borne transmission, waterborne transmission, attendant-borne transmission, and durability in the external environment ( Table 1 ).