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Digital PCR measurement results with 95% confidence intervals from three NMIs for RM 1 (A) and RM 2 (B). The dotted line in (A) represents the expected SARS-CoV-2 RNA loads of 107 copies/mL for RM 1. The dotted line in (B) represents the expected SARS-CoV-2 RNA loads of 106 copies/mL for RM 2.
