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(a) Proteinase K lysis efficacy on nasal mid-turbinate (NMT) swabs spiked with 0, 1000, 500 and 250 pfus of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), 100 copies of synthetic SARS-CoV-2 RNA, 50 copies of synthetic SARS-CoV-2 RNA and non-template water controls.; (b) TCEP/EDTA lysis efficacy on NMT swabs spiked with inactivated SARS-CoV-2. Bottom strip shows Twist Biosciences SARS-CoV-2 RNA and negative water controls.
