This WHO statement has been widely misinterpreted, is is not the case that PCR tests were resulting in inflated numbers of false positives, see Reuters fact check [1] from February 4, 2021, and [2] from April 8, 2021.

[1] https://www.reuters.com/article/uk-factcheck-who-instruction... [2] https://www.reuters.com/article/factcheck-who-pcr-idUSL1N2M1...