A Covid-19 modeller says mask-wearing remains critical
Dion O'Neale from Te Pūnaha Matatini told Morning Report international research shows well-fitted masks are highly effective.
"Masks are really effective at blocking transmission, they protect you, and if you're wearing a mask, you're also protecting the people around you."
O'Neale says quality ventilation also helps reduce the risk of Covid-19 transmission.
