Figure 2: Reported incidence of acute hepatitis B infections among infants in Canada, 1992–2007. Data were compiled from the 2007 annual report of the BC Centre for Disease Control,³⁴ the 2005 release of the Canadian Notifiable Diseases reporting system,³⁵ the British Columbia Integrated Public Health Information System (iPHIS), and the Rapport sur l'ensemble des maladies des dix dernières années, Province du Quebec.³⁶ *Rates for this period in British Columbia and Quebec are based on complete data from 2004–2007, while rates in Ontario and Canada are based on 2004 data. Note: Infant infections tend to be asymptomatic, and are thus underreported. Data are presented here in 4-year intervals because of the instability of small numbers.