This is the ValueSet that contains codes in both IMMZD18STyphoidTy21a ValueSet for Decision Table (http://smart.who.int/immunizations/ValueSet/IMMZD18STyphoidTy21aVS) and IMMZD18STyphoidTy21a ValueSet for Decision Table (http://smart.who.int/immunizations/ValueSet/IMMZD18STyphoidTy21aVS).