Several studies showed that the key receptors used by #coronavirus to enter the body only increase after the age of 10 @ProfHGoossens https://www.biorxiv.org/content/10.1101/2020.04.19.049254v2.full.pdf
It is hypothesized that the lower risk among children is due to differential expression of ACE2, the receptor that severe #coronavirus (SARS-CoV-2) uses for host entry. That would explain why kids don't get sick nor transmit the virus https://jamanetwork.com/journals/jama/fullarticle/2766524?utm_campaign=articlePDF&utm_medium=articlePDFlink&utm_source=articlePDF&utm_content=jama.2020.8707
SARS-CoV-2 transmission in children in schools appears considerably less than seen for other respiratory viruses,
such as influenza. In contrast to influenza, data from both virus & antibody testing to date suggest that children are
not the primary drivers http://ncirs.org.au/sites/default/files/2020-04/NCIRS%20NSW%20Schools%20COVID_Summary_FINAL%20public_26%20April%202020.pdf
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