Both are viruses and cause fever, cough, body aches, fatigue and sometimes vomiting and diarrhea.
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They can range from mild to severe, and both diseases are potentially deadly.
Neither virus is treatable with antibiotics, but the flu can be treated with anti-viral drugs that can help lessen symptoms and the duration.
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One big difference is there is there is no vaccine for coronavirus, although several options are being studied.
Experts say your best bet to avoid the flu is to get a flu shot, and it's still not too late.
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