What are coronavirus antibody tests and do they exist yet?
A test for the new coronavirus can determine if a person has ever been infected with COVID-19, thereby giving officials a clearer picture of the full scope of the outbreak. Unlike the nasal swab that determines if a person is currently infected, the antibody test, which requires a blood sample, can determine if a person was ever infected even if they didn't know it. While both tests are beneficial, being able to determine what portion of the population has had the virus, including those who were asymptomatic or had mild cases and weren't tested, helps show the extent of the outbreak and who is possibly immune.
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