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. 2020 Apr 10;81(1):e80–e81. doi: 10.1016/j.jinf.2020.03.052

Fig. 1.

Fig. 1

Changing Titers of SARS-CoV-2 Specific antibody. (A) Serum SARS-CoV-2 specific IgM levels were tested within day 3 to 39 after the onset of COVID-19 every 3 days using enzyme-linked immunosorbent assay kits. All severe patients were transferred from other hospital to Zhongnan Hospital in range of day 6 to 9 of the onset of COVID-19, so we could not collect blood for testing serum SARS-CoV-2 specific IgM levels at day 9 before the onset of COVID-19. All mild patients were discharged at day 33 after the onset of COVID-19, no blood was collected for testing serum SARS-CoV-2 specific IgM levels at day 33 after the onset of COVID-19. (B) Serum SARS-CoV-2 specific IgG levels were tested within day 3 to 39 after the onset of COVID-19 every 3 days using enzyme-linked immunosorbent assay kits. All severe patients were transferred from other hospital to Zhongnan Hospital in range of day 6 to 9 of the onset of COVID-19, so we could not collect blood for testing serum SARS-CoV-2 specific IgG levels at day 9 before the onset of COVID-19. All mild patients were discharged at day 33 after the onset of COVID-19, no blood was collected for testing serum SARS-CoV-2 specific IgG levels at day 33 after the onset of COVID-19.