Question: what is the difference between a pcr test and an antigen test?
Answer: PCR tests look for pieces of SARS-CoV-2, the virus that causes COVID-19, in the nose, throat, or other areas in the respiratory tract to determine if the person has an active infection. Antigen tests look for pieces of proteins that make up the SARS- CoV-2 virus to determine if the person has an active infection.