It's 'impossible to say' whether better, quicker testing would have avoided some of the UK's grim toll of care home deaths, a medical chief has said.
Yvonne Doyle said experts are trying to learn the answer after 3,811 deaths outside hospital since March were included in daily figures for the first time.
The Medical Director of Public Health England told the Mirror that in some ways, testing would not help - as some elderly residents died so quickly, they were not able to get a test.
But she also said the "movement of staff" - who were not routinely tested in care homes until a fortnight ago - was "critical" in how Covid-19 is spread.