They may be similar, but from what I've read, a PCR test is not done by taking a blood sample - only nasal swabs and saliva samples.Seralogic tests and PCR tests are similar and both imperfect:
Different paths to the same destination: screening for Covid-19
Explore the different types of COVID-19 tests including antibody, PCR, and antigen tests. Stay informed with Medical Device Networkwww.medicaldevice-network.com