‘Their immune system sees the virus “and it just mounts this really quick and effective immune response that shuts it down, before it has a chance to replicate to the point that it comes up positive on the swab diagnostic test”, says Melanie Neeland, an immunologist who studied the family, at the Murdoch Children’s Research Institute in Melbourne, Australia.
‘Even in children who experienced the severe but rare complication called multisystem inflammatory syndrome in response to SARS-CoV-2 infection, studies report that the rate of positive results on RT-PCR range from just 29% to 50%.‘
Read here (Nature, Dec 10, 2020)