Fig. 4From: Measuring COVID-19 vaccination coverage: an enhanced age-adjusted two-step floating catchment area modelProposed distribution for allocating potential COVID-19 vaccination centres. A areas of influence map of top 20% potential vaccination centres; B magnified window of map A focused on CBD area; C the relationship between PSA and distance from the CBD area. The strength of the blue colour Thiessen polygon ramp indicates the relative PSA scoreBack to article page