Assertion: pathogen | /r/HasProperty | absent
Facets:
value: from suitable areas
type: LOCATION
value: because of past eradication campaigns
type: CAUSE
value: because of historical accidents
type: CAUSE
Source sentences:
text: The most serious threat involved in vector-borne transmission comes from pathogens that can be maintained by human/mosquito cycles but are absent from suitable areas because of historical accidents or past eradication campaigns.