A test to find out whether people have ever been infected with coronavirus has been approved by health officials in England.
Public Health England said an antibody test developed by Swiss pharmaceutical company Roche is a “very positive development”.
The blood test looks for antibodies to see if a person has already had the virus, and may now have some immunity.
Until now, officials had said these tests were not sufficiently reliable.
But sources say this is the first one to offer serious potential.
Experts at the government’s Porton Down facility evaluated the test last week, Public Health England said, and found it to be “highly specific”.
Prof John Newton, national coordinator of the UK coronavirus testing programme, said: “This is a very positive development because such a