FYI regarding various antigen testsThe following link shows 34 FDA-EUA COVID-19 Antigen Tests approved. Technically it only 20 companies, each with their own single test (20 tests). Some of these 20 tests have multiple use-case purposes, making take them to 34 distinct uses for the 20 different tests. More important, all (100%) of these COVID-19 Antigen Tests require nasal swab testing. FDA-EUA Antigen Test Website: https://www.fda.gov/medical-devices/coronavirus-disease-2019-covid-19-emergency-use-authorizations-medical-devices/in-vitro-diagnostics-euas-antigen-diagnostic-tests-sars-cov-2