[link to twitter.com (secure)]
"Also Canada:
"An infectious diseases pediatrician at Sainte-Justine Hospital in Montreal says COVID-19 is believed to be a factor in more than a dozen cases of Kawasaki-like illness there.""

[link to www.cp24.com (secure)]
"Canadian Paediatric Society eyes mysterious syndrome for suspected COVID links"

Kawasaki is an inflammatory syndrome. We don't really know all there is to know about Covid biological, could have hidden cookies that have secondary results. Or there could be multiple attacks going on.