Gronvall has been tracking Covid-19 testing practices throughout the pandemic. Photo / John Hopkins UniversityAnd she said the effects of the virus on children who have become sick have been devastating. Pool testing or batch testing is a long-standing method for efficiently testing large groups of people. "If you're testing somebody every day and they don't have a lot of virus in their nose, then they're not contagious. But New Zealand schools are largely relying on opening doors and windows to try to improve ventilation.

Source: New Zealand Herald November 17, 2021 00:38 UTC