Public Health England is working on an antibody test which will show who has had the novel coronavirus despite having no symptoms. 

Research on the test is progressing quickly, Prime Minister Boris Johnson said Wednesday at a press conference in Downing Street.

“The great thing about having a test to see whether you’ve had it enough, is suddenly a green light goes on above your head and you can go back to work safe and confident in the knowledge that you are most unlikely to get it again,” Johnson said.

He added that the test would be a “game-changer”

Read more: UK to develop 'game-changer' COVID-19 test: PM