Fig. 3

Dilution series of plaque-forming units (PFU) of an average of our isolates compared to a commercially available external standard using synthetic RNA copies (COV019, CE, Exact Diagnostics, USA)
Dilution series of plaque-forming units (PFU) of an average of our isolates compared to a commercially available external standard using synthetic RNA copies (COV019, CE, Exact Diagnostics, USA)