Can mass tests stop the spread of the coronavirus?

By Michael le page

People queuing at a coronavirus testing center in Liverpool, UK

REUTERS / Carl Recine

It probably looks like some countries will soon be able to vaccinate at least some people against the coronavirus, but until vaccines are widespread, mass testing will be seen as a way back to normal life. For example, UK Prime Minister Boris Johnson announced on November 23 that daily coronavirus tests would be carried out on people who have come into contact with people who have tested positive for the coronavirus in order to limit the number of days they spend need yourself. isolate. The measure will be …