TABLE 2.

IgG antibodies against SARS-CoV in patients and healthy controls

SpecificityNo. (%) of serum samples in:
Set 1 (n = 57)Set 2 (n = 33)Set 3 (n = 100)
PositiveNegativePositiveNegativePositiveNegative
Whole virusa45 (79)12 (21)33 (100)0 (0)2 (2)98 (98)
N proteinb51 (89)6 (11)33 (100)0 (0)2 (2)98 (98)
S proteinc44 (77)13 (23)27 (82)6 (18)d0 (0)100 (100)
  • a Based on the Huada ELISA results.

  • b N-protein-based ELISA results were confirmed by Western blotting assays.

  • c Fragment S450-650 ELISA.

  • d Including five samples (samples PT35, PT40, PT51, PT52, and PT60) that were weakly positive by ELISA but negative by Western blotting assays.