Assertion: pathogen | /r/AtLocation | individual
Facets:
value: with a defined set of symptoms
type: OTHER
Source sentences:
text: In the late 1880s Dr. Robert Koch proposed that to establish a causative link between a pathogen and a disease, the pathogen should be present in all individuals with a defined set of symptoms, and the same clinical symptoms should occur in healthy individual who have been inoculated with the organism isolated in pure form from the sick individual.