Table 4 Table summarizing multiple linear regressions for IgG againist yPfs28C. Increase in body weight decreased the IgG concentration by 1040.428 ng/ml but age and Hb level increased the concentration of IgG against yPfs28 by 2499.702 and 3663.876 ng/ml respectively in children with HbSS but both decrease and increase were not statistically significant. On the other hand, there was a decrease in IgG concentration against yPfs28C by 110.651 ng/ml with an increase in Hb level but age and body weight increased the IgG concentration by 237.158 and 171.869 ng/ml respectively although both decrease and increase were not statistically significant in children with HbAA