In the NSW Bluebook it is under DTPa (as of 2006) - although NSW Health now uses Infanrix Hexa, which is diphtheria, tetanus, pertussis (whooping cough), hepatitis B, poliomyelitis (polio) and Haemophilus influenzae type b (Hib) in one shot. On the Schedule it is 2m, 4m, 6m and 4y.