SARS-CoV-2 RBD IgG levels, AU/mL* SARS-CoV-2 RBD IgG levels, AU/mL* SARS-CoV-2 RBD IgG levels, AU/mL* SARS-CoV-2 RBD IgG levels, AU/mL*
< 50 51-1,050 1,051-4,160 > 4,160 P value
RT-PCR testing result, n (%) Positive Negative n = 12 5 (41.67) 7 (58.33) n = 97 22 (22.68) 75 (77.32) n = 82 15 (18.29) 67 (81.71) n = 80 7 (8.75) 73 (91.25)
0.01
Serum micro-neutralization titer against SARS-CoV-2 wild type, median (IQR)[range]**
n = 3 0 (0-0) [0-0] n = 10 0 (0-0) [0-0] n = 10 10.0 (0-10) [0-20] n = 5 160 (40-320) [20-640]
0.005
Serum neutralization against SARS-CoV-2 B.1.1.7 (VOC α), median (IQR)[range]**
n = 3 0 (0-0) [0-0] n = 10 0 (0-0) [0-0] n = 10 10.0 (10-20) [0-40] n = 5 320 (80-640) [40-640]
0.005