“WHO and CDC denounced the PCR test.”
Don’t lie.
CDC: “Nucleic acid amplification tests (NAATs), including PCR tests, are more likely to detect the virus than antigen tests. NAATs tests are the “gold standard” for COVID-19 tests.”
https://www.cdc.gov/covid/testing/index.html
The CDC denounced the PCR test sometime between Christmas and New Years in 2021.
If the CDC changed up sometime after that, that is on them.