This is the ValueSet that contains codes in both IMMZD18SYellowfeverYellowFever ValueSet for Decision Table (http://smart.who.int/immunizations/ValueSet/IMMZD18SYellowfeverYellowFeverVS) and IMMZD18SYellowfeverYellowFever ValueSet for Decision Table (http://smart.who.int/immunizations/ValueSet/IMMZD18SYellowfeverYellowFeverVS).