9 Anyone aware of any actual research on PCR tests and covid? Would be most interested in seeing positive to negative rates for a specified sample group, and any research on consistency in results for same person tested multiple times sequentially. Thanks. posted 2 days ago by nocomply55 2 days ago by nocomply55 +9 / -0 Non-expert with the temerity to be curious (sorry mom!). 0 comments share 0 comments share save hide report block hide child comments Comments (0) sorted by: top new old worst