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Table 5 Seroprevalence of recruited healthcare workers stratified by nasopharyngeal swab positivity

From: SARS-CoV-2 specific serological pattern in healthcare workers of an Italian COVID-19 forefront hospital

  Negative swab Positive swab p-value
IgG, n (95% CI) 6/22; 27.3% (8.7–45.9%) 4/7; 57.1% (20.4–93.8%) 0.19
IgM, n (95% CI) 21/22; 95.5% (86.8–100%) 6/7; 85.7% (59.8–100%) 0.38