调低PCR筛选周期，从而降低新冠阳性？
Unbelievable. All year, CDC has played dumb about the standard 37 to 40
cycle thresholds used for COVID PCR testing yielding 85-90% false positives.
Lowering the threshold to 28 for post-vaccine testing is proof, if more was
needed, they knew exactly what they were doing. https://twitter.com/MichaelPSenger/status/1387836517259694080
