Claims that CDC’s PCR test can’t tell COVID-19 from flu are wrong We wanted to know whether there was any truth to the idea that the CDC was removing its test because it is faulty and cannot tell one virus from another. So we consulted several laboratory testing experts. This is a Kaiser Health News and Politifact Healthcheck. Written By: Victoria Knight / Kaiser Health News | 2:34 pm, Aug. 2, 2021 “CDC has just announced they will revoke the emergency use authorization of the RT-PCR tests first introduced in 2/20. … Translation: They’ve been adding flu cases to Covid cases when using that test.”