Coved 19, Corona Virus

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Covid 19, known as the "corona virus", is one of a group of larger viruses called coronavirus (coronaviruses), and it infects humans for decades "with many diseases, mostly in the upper respiratory tract". These viruses were discovered in the 1960s, and they are known to be animal-origin Infect animals and humans together, and symptoms of Covid 19 range from mild to severe, from one infected person to another: some have little or no symptoms of it, some have flu-like symptoms, and some require an artificial respiratory system.