Fig. 1
From: Investigating the pertussis resurgence in England and Wales, and options for future control
Number of annual notifications (a) between 1954 and 2013 and (b) between 1986 and 2013 in England and Wales in seven age groups, and the historical vaccine coverage (course completed) for the primary and pre-school booster programmes (blue line: wP primary vaccine coverage, red line: aP primary vaccine coverage, black line: aP pre-school booster vaccine coverage). Coverage data for 1957 to 1966 not collected but assumed to be the same as in 1967 as it was added into an existing DT vaccine (available to download in Additional file 1)