What Are Symptoms of Flu? Flu (Influenza) is an infectious disease of the upper airways, usually manifested by fever, cough, sore throat, muscle aches and pains, headaches, fatigue, loss of appetite, nausea…
What Are Symptoms of Flu? Flu (Influenza) is an infectious disease of the upper airways, usually manifested by fever, cough, sore throat, muscle aches and pains, headaches, fatigue, loss of appetite, nausea…