Why COVID 19 related morbidity and mortality is very loose in children?

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One reason for such moderate impact could be that the new coronavirus can invade any cell in the human body that manufactures the ACE2 protein, and these proteins aren't fully matured, functional and/or sensitive in children as they are in adults. Studies have also shown that since children often experience respiratory infections, their bodies may be able to produce more antibodies to fend off the virus. Also, children are less frequently symptomatic and have less severe symptoms they are less often tested, which might lead to an underestimate of the true numbers infected. Also, children are less frequently exposed to the main sources of transmission.

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