“I walked around with COVID for a week, because of late results.” GS Labs, subcontractor issue delays COVID info GS Labs, which works closely with 88Med in Omaha offers three tests: The antibody test determines whether you were ever exposed to COVID-19. The antigen test gives you results in up to 20 minutes. The PCR test, hailed as the most accurate COVID-19 test. It’s specifically the PCR saliva tests that are what GS Labs and its subcontractor, ImmunoGenomics in Texas, say has created a mountain of headaches. “The saliva-based testing wasn’t being offered too many places,” said Gabe Sullivan, owner of GS Labs in Omaha.