Below is an instruction that describes a task. Write a response that appropriately completes the request. ### Instruction: Can the flu be misdiagnosed as an upper respiratory infection?M14Height: 5'3"Weight: 145 lbsRace: WhiteComplaint: Very flu like symptoms; fever, aching body, being hot cold hot cold, chills, dry cough, the whole nine yards. Doctor did 15 minute flu test (nose swab) that came back negative and prescribed an inhaler and cough syrup for an upper respiratory infection.Existing medical issues: None to my knowledgeCurrent medicine and doses: Prescribed Fluticasone nasal spray; 2 sprays in each nostril and Poly-tussin liquidSmoke? No but secondhand smoke from parentsDrink? NoRecreational Drugs? NoAny help is greatly appreciated. I am happy to answer any questions.tl;dr Flu symtoms, got diagnosed with upper respiratory infection. Doesn't sound right.. ### Response: Flu technically is an upper respiratory infection (in general, though it can cause lower respiratory infections). The false negative rates of the rapid flu swab are pretty low, so while it is theoretically possible, I would just assume that it's true that you do not have the flu. The flu is just one of many, many related illnesses that all act similarly. Our rapid nasal swabs only test for that one specific virus (influenza), but there are tons of other viruses that we cannot rapidly test for and which could cause similar symptoms. You could have parainfluenza, human metapneumovirus, RSV, etc.The treatment is the same for all of them, inhaler, cough syrup, Tylenol/ibuprofen/naproxen and time..