I believe that we learned of this error (diagnosis 40% wrong) weeks ago. FOX is late in reporting.
The WHO tests are likely being used in foreign nations, but not the US of A.
None the less, it’s an unmitigated disaster.
The original CDC test had some problems with producing "inconclusive" results, and they took a lot of heat for not using the WHO tests. They stood their ground and made their own. I wonder if they didn't trust the WHO test from the beginning? I also guess that means we'll say "no thanks" to Jack Ma's donated tests.
I recall hearing about many false tests in the early days in China.
Something like, False, False, Positive, False, False....
It was one of the reasons the numbers were so tough to pin down.