Assertion: influenza b virus | /r/HasProperty | collected by u.s. laboratories
Facets:
value: since october
type: TEMPORAL
Source sentences:
text: As of May 30, 2009: "CDC has antigenically characterized 1,567 seasonal human influenza viruses [947 influenza A (H1), 162 influenza A (H3) and 458 influenza B viruses] collected by U.S. laboratories since October 1, 2008, and 84 novel influenza