Julie Cruz takes a sample at the GeneIQ COVID-19 testing site at Dallas College Richland Campus on Wednesday, Jan. 19, 2022, in Dallas, TX. Juan Figueroa / Staff Photographer At-home COVID-19 tests ...
Polymerase chain reaction (PCR) and rapid (antigen) tests for COVID-19 both involve taking a swab. Results for a PCR test take longer, as it needs to go to a laboratory. It is more costly but tends to ...
A polymerase chain reaction (PCR) test detects genetic material from a pathogen or abnormal cell sample. Ways of collecting samples include a nasal swab, a saliva swab, or taking a sample of blood.
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