2 WHAT WAS/IS THE BASIS FOR DECLARING THE COVID-19 PANDEMIC IF CDC STATES: no quantified virus isolates of the 2019-NCoV- BASIS FOR DEVELOPMENT OF RT-PCR TEST. RT-PCR Diagnostic Panel, the assay first introduced in February 2020 for detection of SARS-CoV-2 only IS WITHDRAWN. posted 3 years ago by tenbares 3 years ago by tenbares +2 / -0 0 comments share 0 comments share save hide report block hide replies