Participants were randomly assigned ( @:@:@ ) at first vaccination by block randomisation with minimisation by centre to receive three doses of RTS , S/AS@ at months @ , @ , and @ and a booster dose at month @ ( R@R group ) ; three doses of RTS , S/AS@ and a dose of comparator vaccine at month @ ( R@C group ) ; or a comparator vaccine at months @ , @ , @ , and @ ( C@C -LSB- control group -RSB- ) .