Experts warn children could soon play a much bigger role in the pandemic. Just because kids often don't show symptoms, doesn't mean they don't carry any traces of the virus, new research has shown. 

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While children might contract COVID-19 at lower rates to adults and show milder or no symptoms, once they do catch the virus, scientists say they may carry unusually high loads of it.

This means even without any obvious symptoms, kids with COVID-19 are potentially contagious, carrying a high number of viral particles from school to home and back again.