Sources

1) BBC - Covax: How Will Covid Vaccines Be Shared Around The World? 

https://www.bbc.com/news/world-55795297

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2) NPR - Biden Takes First Jab At Vaccine Diplomacy, Sharing Doses With Mexico, Canada

https://www.npr.org/2021/03/19/979279426/biden-takes-first-jab-at-vaccine-diplomacy-sharing-doses-with-mexico-canada

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3) CNN - Biden Administration Finalizing Plans To Send Millions of AstraZeneca Vaccine Doses To Canada and Mexico

https://www.cnn.com/2021/03/17/politics/us-astrazeneca-mexico-canada/index.html

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4) New York Times - Rich Countries Signed Away a Chance To Vaccinate The World

https://www.nytimes.com/2021/03/21/world/vaccine-patents-us-eu.html