ESTIMATING THE RATE OF ACQUIRING IMMUNITY TO SEVERE DISEASE DUE TO PLASMODIUM FALCIPARUM WITH AGE AND EXPOSURE - Hollingsworth,D; Ferguson,N; Griffin,J; Donnelly,C; Drakeley,C; Riley,E; Reyburn,H; Ghani,A (AMER SOC TROP MED & HYGIENE, 2009)