what is the covid 19???
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a dangerous viruses please mark brainlist
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A coronavirus is a kind of common virus that causes an infection in your nose, sinuses, or upper throat. COVID-19 is a disease caused by SARS-CoV-2 that can trigger what doctors call a respiratory tract infection. It can affect your upper respiratory tract (sinuses, nose, and throat) or lower respiratory tract (windpipe and lungs).
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