Escher Biomedical Diagnostics Announces BT-MED® COV19 Test for Detection of COVID-19 Virus Infection in Saliva Samples AUSTIN, Texas, March 29, 2021 (GLOBE NEWSWIRE) -- Escher Biomedical Diagnostics, LLC announced that its Escher BT-MED® COV19 Saliva Test has been accepted by FDA as a Notification under Section IV.C...