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Here’s the best chart I’ve found so far to compare the effectiveness of the Pfizer, Moderna, AstraZeneca, Janssen (Johnson & Johnson), and Novavax vaccines against COVID-19 (last updated 1/31/21). The chart is published at the site “Your Local Epidemiologist,” by epidemiologist Katelyn Jetelina. Other factors compared in the table: effectiveness of each vaccine against the variant first identified in the UK and the one first identified in South Africa, where known; effectiveness against severe COVID-19; status of each vaccine in the U.S. (such good news in this line of the table); status of experiments/trials in children; and the vaccine makers’ plan for addressing new viral variants. As I read in a December 2020 story at Business Insider, it can be complex to compare effectiveness and other results across these vaccine studies, because they were done differently.