Figure 3From: Dynamic models of pneumococcal carriage and the impact of the Heptavalent Pneumococcal Conjugate Vaccine on invasive pneumococcal disease Pre and post PCV7 vaccination IPD data in the US. Age distribution of IPD cases belonging to the vaccine serotype group (+6A) and non-vaccine serotype group (-- 6A) in 8 counties included in the Active Bacterial Core Surveillance data in the US between 1998 and 2004.Back to article page