Table 1.

Intensity of antibody recognition against RBD and S protein related to average value of negative sera.

Serum sample #	RBD⁎	S⁎
1	10.8	41.3
2	4.3	25.6
3	11	35
4	7.9	29.5
5	9.3	36.3
6	6.5	36.2
7	7.2	36.2
8	3	14.2
9	4.3	17.2
10	4.1	5.6

^⁎Ratio of serum sample#/average negative sera.