Assertion: acute bronchitis | /r/CreatedBy | cold or flu virus
Facets:
value: often
type: TEMPORAL
Source sentences:
text: Acute bronchitis is caused by a viral infection, such as the cold or flu virus.
text: Acute bronchitis is the kind of bronchitis that is most often contagious, given that it is often caused by flu and cold viruses.
text: Acute bronchitis is contagious if it is caused by either a cold or flu viruses.