Fig. 4From: Who should be prioritized for COVID-19 vaccination in China? A descriptive studyDays needed to vaccinate 70% of the target population, stratified by vaccination tier, under the assumption that 10 million doses are administered per day. Note that values reported within the square (e.g., 182.5 m) denote 70% of the population size in each tier; m denotes millionBack to article page