Could testing for Covid-19 be more efficient?

“I never thought it would be so easy to take people's freedoms away and so hard to persuade them to take them back.” That's what Boris Johnson is said to have told his colleagues recently. The biggest uncertainty for now is whether or not England’s schools will start to re-open on 1 June. Teachers’ unions say it won’t be safe for their members to return – and a growing number of councils are supporting that position. The much talked about system to test, track and isolate those with the virus might persuade people it's safe to ease the lockdown further – but when will it be ready? (Image: Virus testing lab. Credit: Getty Images)