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Scatter plots representing cycle threshold (Ct) values (median and interquartile range) obtained in SARS-CoV-2 PCR positive samples from patients clinically suspected of having COVID-19 and close asymptomatic contacts using SGTI-Flex (1), Panbio (b), and NovaGen (c). Samples are grouped by antigen results; plots indicate Ct values of samples from patients with positive (green) and negative antigen results (red). ∗Statistically significant difference (p < 0.05).
