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64% (95% confidence interval (CI) 62.20% to 65.04%) and 96.64% (95% CI 96.05% to 97.13%), while those of the venous blood test were, respectively, 78.79% (95% CI 77.58% to 79.94%) and 99.36% (95% CI 99.07% to 99.55%). Among the low-risk populations, the POC test's predictive values were 58.33% (positive) and 98.23% (negative), whereas those of the venous blood test were 92.86% (positive) and 98.53% (negative). According to our study, these serological tests cannot be a valid alternative to diagnose COVID-19 infection in progress.During