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World COVID-19 vaccination policies (Data published by Thomas Hale, Sam Webster, Anna Petherick, Toby Phillips, and Beatriz Kira (2020). Oxford COVID-19 Government Response Tracker, Blavatnik School of Government. Available at: https://ourworldindata.org/coronavirus, updated on February 26, 2021). The groups are the following: key workers/clinically vulnerable groups/elderly groups.
