Testing better than travel ban 'whack-a-mole'?

An Ontario infectious disease specialist says there is evidence testing all travellers before and after they arrive in Canada will identify most cases of COVID-19 coming into the country.

Testing better than travel ban 'whack-a-mole'?
An Ontario infectious disease specialist says there is evidence testing all travellers before and after they arrive in Canada will identify most cases of COVID-19 coming into the country.