How effective is spit test for COVID-19? TODAY tries it out- how accurate is the coronavirus nasal test ,26/8/2020· Unlike the initial COVID-19 tests, which required a nasal swab, this new test just uses a saliva sample to determine if a person is currently infected with the virus. NBC News investigative and consumer correspondent Vicky Nguyen appeared on TODAY Wednesday morning to discuss the new COVID-19 test, which she called a potential "major step forward," and to try it out herself.PCR Test (Nasal Swab) vs. Antigen Test for COVID-1924/2/2021· A PCR (polymerase chain reaction) COVID-19 nasal swab test looks for genetic material from the deadly pandemic coronavirus, itself. A positive result means you are infected and should start quarantining. A positive antigen test also means you have an active infection, but this assay looks for protein specific to the virus instead of genetic material.
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