Of the five countries, Canada exhibits the most variation between provinces in health system coordination. We examined the websites of Canada's 84 provincial regional health authorities (RHAS, 14 plans identified) and Ontario's 36 public health units (26 plans identified) and 14 Local Health Integration Networks (no pandemic plans identified). We excluded the RHA and public health unit plans from inter-country quantitative analysis, as their level of devolution and/or responsibilities for health management differed from those examined in the other four countries, but have included descriptive details from some of the RHA plans where they illustrate innovative approaches.