Table 2. Proportion of students considered immunized during two epidemic periods after diphtheria, tetanus and acellular pertussis vaccine programme roll-out, by age and jurisdictional grouping, Australia, 2005–2009.

Jurisdictional groupinga	Percentage immunized
	2005–2007			2008–2009
	< 16 years	≥ 16 years		< 16 years	≥ 16 years
Australian Capital Territory/ South Australia/Victoria	34	49		32	91
New South Wales	75	51		25	100
Western Australia	92	9		100	62
Queensland	9	0		25	38

^a Jurisdictional groupings were based on programme delivery characteristics.