Could you please post a source for SARS-Cov-19 genetic strain tracking? Are all of the testing facilities doing gene sequencing on their positive results? The

Could you please post a source for SARS-Cov-19 genetic strain tracking? Are all of the testing facilities doing gene sequencing on their positive results? The re-infection cases that I read about were shown to have been from different strains. Perhaps this is not the common case, but without more information, I am reluctant to accept your statement at face value.