Ann Clin Microbiol 2022;25:85-95. Antibody detection in healthcare workers after vaccination with two doses of the BNT162b2 or ChAdOx1 vaccine
Table 2. Pfizer BNT162b2 seropositive rate and quantitative level of immunoglobin according to Elecsys COV2S and Centaur COV2T
Quantitation U/mLPfizer BNT162b2 – post 3 weeks Pfizer BNT162b2 – post 16 weeks
Male (n = 40)Female (n = 78)Total (n = 118) Male (n = 40)Female (n = 77)Total (n = 117)*
Elecsys COV2S       
0.8 – 19.994 (10.0)15 (19.2)19 (16.1) 
20 – 49.9917 (42.5)16 (20.5)33 (28.0) 1 (1.3)1 (0.9)
50 – 99.998 (20.0)14 (17.9)21 (18.6) 
100 – 174.994< (10.0)18 (23.1)22 (18.6) 
175 – 249.993 (7.5)9 (11.5)12 (10.2) 1 (2.5)1 (1.3)2 (1.7)
above 2504 (10.0)6 (7.7)10 (8.5) 39 (97.5)75 (97.4)114 (97.4)
Centaur COV2T       
Negative1 (2.5)1 (1.3)2 (1.7) 
1 – 4.9914 (35.0)28 (35.9)42 (35.6) 
5 – 1012 (30.0)18 (23.1)30 (25.4) 1 (1.3)1 (0.9)
> 1013 (32.5)31 (39.7)44 (37.3) 40 (100.0)76 (98.7)116 (99.1)

Values are presented as n (%). *1 subject was not tested at post 16 weeks. Abbreviation: Centaur COV2T, Centaur XPT SARS-CoV-2; Elecsys COV2S, Elecsys Anti-SARSCoV-2S