Good question, I don't know. If it helps, a quick search got this https://www.cdc.gov/coronavirus/2019-ncov/cases-updates/testing-in-us.html?CDC_AA_refVal=https

Good question, I don't know. If it helps, a quick search got this https://www.cdc.gov/coronavirus/2019-ncov/cases-updates/testing-in-us.html?CDC_AA_refVal=https%3A%2F%2Fwww.cdc.gov%2Fcoronavirus%2F2019-ncov%2Ftesting-in-us.html https://www.cdc.gov/coronavirus/2019-ncov/cases-updates/test... See table at bottom.