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Fig. 3 | BMC Infectious Diseases

Fig. 3

From: Genetic testing and serological screening for SARS-CoV-2 infection in a COVID-19 outbreak in a nursing facility in Japan

Fig. 3

Clinical course of residents with PCR-negative and IgG-positive results for SARS-CoV-2. The serum sample obtained from resident no. 28 on May 1 was the one remaining from biochemical testing. The calculated signal-to-cutoff values of ≥1.4 indicate positive detection of anti-SARS-CoV-2 IgG antibodies. SARS-CoV-2, severe acute respiratory syndrome coronavirus 2

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