A viral infectious disease that results in infection, located in respiratory tract, has_material_basis_in Influenzavirus A, has_material_basis_in Influenzavirus B, or has_material_basis_in Influenzavirus C, 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.