TABLE 2.

Serum IgG reactivity to multiple MSP1 block 2 repeat antigens before the transmission season is associated with protection in an incremental manner

No. of repeat antigens recognized	No. of sera	No. (%) of individuals getting malaria	Relative risk (95% confidence interval)	P value
0	253	146 (58)	1
1	38	22 (58)	1.00 (0.75-1.34)	0.98
2	26	11 (42)	0.73 (0.46-1.16)	0.13
3	5	0 (0)	0 (∞)	0.015
4	12	2 (17)	0.29 (0.08-1.03)	0.005
3 or more	17	2 (12)	0.20 (0.06-0.75)	0.0002