Assertion: flu | /r/HasProperty | difficult to diagnose
Facets:
Source sentences:
text: Influenza can be difficult to diagnose based on clinical signs and symptoms alone because the signs and symptoms of influenza can be similar to those caused by other infectious agents including, but not limited to, Mycoplasma pneumoniae, adenoviruses, respiratory syncytial viruses, rhinoviruses, parainfluenza viruses, and Legionella spp.