Fig. 2

Lumira Ag testing and RT-PCR analysis. a Viral load determined using RT-PCR in Lumira Ag-positive and -negative groups. b Viral load determined using RT-PCR was compared in viral culture-positive and -negative groups. A t-test was applied to assess the differences between groups. ****, p < 0.0001; ns, not significant; NEG, negative; POS, positive