DO_infectious_disease_slim NCIthesaurus has material basis in transmitted by has symptom has major susceptibility factor disease has location respiratory system disease influenza ICD9CM:487 ICD10CM:J11.1 MESH:D007251 A viral infectious disease that results in infection, located in respiratory tract, has_material_basis_in Influenzavirus A (Alphainfluenzavirus), has_material_basis_in Influenzavirus B (Betainfluenzavirus), or has_material_basis_in Influenzavirus C (Gammainfluenzavirus), which are transmitted_by droplet spread of oronasal secretions during coughing, sneezing, or talking from an infected person. It is a highly contagious disease that affects birds and mammals and has_symptom chills, has_symptom fever, has_symptom sore throat, has_symptom runny nose, has_symptom muscle pains, has_symptom severe headache, has_symptom cough, and has_symptom weakness. disease_ontology DOID:8468 Influenza with other manifestations NCI:C53482 SNOMEDCT_US_2025_09_01:155559006 DOID:8469 UMLS_CUI:C0021400 flu influenza with non-respiratory manifestation viral infectious disease susceptibility to severe influenza Alphainfluenzavirus Betainfluenzavirus Gammainfluenzavirus severe headache weakness rhinorrhea fever cough muscle pain chills pharynx inflammation droplet spread transmission respiratory system