Why do you test negative on an antigen test with COVID-19 symptoms? Do you have flu? Not necessarily — here’s why

Why do you test negative on an antigen test with COVID-19 symptoms? Do you have flu? Not necessarily --- here's why

You have a blistering headache. Your body aches. You’ve developed a cough. You’re sneezing. But you test negative on an antigen test. Do you have COVID-19, the disease caused by the virus SARS-CoV-2? Or the flu? Or “flurona” — that is, both?

It’s a stressful dilemma and an increasingly common question. Flu season is upon us. Omicron is upon us. If you have a flu vaccine and/or a COVID-19 vaccine, your immune system will kick in faster to fight the virus. And then you start to feel sick.

You isolate for at least 5 full days — day zero being the first day of symptoms — because that’s the responsible thing to do. Yet you still have your sense of taste and smell, but that doesn’t mean you don’t have COVID-19.

“Get vaccinated, get boosted, wear a mask in public indoor settings in areas of substantial and high community transmission,” says…

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