Rupeena Purewal says when the coronavirus infects children, their bodies react differently than those of adults. She's leading the only Saskatchewan-based clinical trials of human convalescent plasma on children sick enough to be admitted to hospital.

So far, there aren't many children with Covid-19 in hospital, but with the cold weather come higher infection rates, and the risk of other serious respiratory infections.

And, as she learns more about the coronavirus' asymptomatic spread, Dr. Purewal warns parents they cannot afford to keep skipping routine vaccinations or check-ups for their kids.