Assertion: flu's illness | /r/CreatedBy | strains of influenza viruses
Facets:
Source sentences:
text: Bird flu is similar to swine flu, dog flu, horse flu and human flu as an illness caused by strains of influenza viruses that have adapted to a specific host.
text: Bird flu is similar to swine flu, dog flu, horse flu and human flu as an illness caused by strains of influenza viruses that have adapted to a specific host.