Fig. 1From: Using record linkage to validate notification and laboratory data for a more accurate assessment of notifiable infectious diseasesNumber of influenza, IPD and pertussis cases that were found in each datasets. IPD = invasive pneumococcal disease; WANIDD = Western Australian Notifiable Infectious Diseases Database; PathWest = PathWest Laboratory Medicine Western Australia Database. *Influenza and IPD data restricted to 2001–2012Back to article page