Symptoms:- Common human corona viruses Common human coronaviruses, including types 229E, NL63, OC43, and HKU1, usually cause mild to moderate upper-respiratory tract illnesses, like the common cold. Most people get infected with these viruses at some point in their lives. These illnesses usually only last for a short amount of time. Symptoms may include runny nose headache. cough sore throat fever a general feeling of being unwell Human coronaviruses can sometimes cause lower-respiratory tract illnesses, such as pneumonia or bronchitis. This is more common in people with cardiopulmonary disease, people with weakened immune systems, infants, and older adults. Transmission :- Human coronaviruses most commonly spread from an infected person to others through the air by coughing and sneezing close personal contact, such as touching or shaking hands touching an object or surface with the virus on it, then touching your mouth, nose, or eyes before washing yo
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