INFERRING THE YELLOW FEVER FORCE OF INFECTION FROM THE OBSERVED AGE DISTRIBUTION OF CONFIRMED CASES - Garske,T; Jean,K; Van,Kerkhove MD; Yactayo,S; Perea,W; Biey,J; Sall,A; Donnelly,CA; Ferguson,NM (AMER SOC TROP MED & HYGIENE, 2015)