TABLE 1.

Detection of antibodies to the SARS-CoV in sera from patients with probable SARS by the N13-based antigen-capturing ELISA and the indirect ELISA based on a whole-virus lysate

Day of sample collection after fever onsetNo. of samplesNo. (%) of samples positive by:
Indirect ELISAAntigen- capturing ELISA
IgGIgMIgG + IgM
12-1471 (14.3)1 (14.3)1 (14.3)1 (14.3)
15-212514 (56.0)9 (36.0)15 (60.0)13 (52.0)
22-286055 (91.7)47 (78.3)56 (93.3)55 (91.7)
29-359685 (88.5)62 (64.6)88 (91.7)91 (94.8)
36-425145 (88.2)30 (58.8)46 (90.2)51 (100.0)
43-492623 (88.5)15 (57.7)23 (88.5)24 (92.3)
50-721512 (80.0)6 (40.0)12 (80.0)15 (100.0)
Total280235 (83.9)170 (60.7)241 (86.1)250 (89.3)