Hmmm… From ET’s link:
– “Forty different lateral flow devices were put forward, of which nine met the criteria to continue to full evaluation. Six made it to the third phase, and the Innova SARS-CoV-2 Antigen Rapid Qualitative Test, the test being used in the Liverpool pilot, is nearing completion of the four-stage process.”
Maybe the care home is using a system that didn’t even make it to evaluation. The following article was written since the above clinical evaluation was completed:
– Covid-19: government must urgently rethink lateral flow test roll out
– Plans to widen roll out risk serious harm
– BMJ Opinion – January 12, 2021
– “In the Liverpool pilot study, 60% (95% CI 48% to 71%) of infected symptomless people went undetected, including 33% (19% to 50%) of those with high viral loads who are at highest risk of infecting others.  Among students in Birmingham, only 3% (1% to 16%) of those who would have tested positive on PCR were detected. ”
There seems to be plenty of wiggle-room for employers desperate to keep a business afloat, and care homes are highly threatened at present. People have a tendency to latch onto reassuring results, and then there’s the “not my fault” urge; “we used the tests in good faith”.
The problem underlying all of this is the current economic system that sets everyone and every business into mortal competition with their peers – and I do mean mortal; if you run out of money you lose access to food, fuel and shelter.
But in any sensible assessment, the people are the economy, and we all share our primary common interests against the virus. In many cases covid-19 is making the system’s inherent combat more desperate, more intense. Just like the climate and ecological crisis, people and organisations in competition can become each other’s own worst enemies, making problems many times worse than needs be.