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Early on in the pandemic, global health experts envisioned a nightmare scenario: Covid-19 vaccines are created, but they go almost exclusively to rich countries that can afford to buy them. People in poorer countries are left to get sick and die.
To prevent this, the experts set up an international initiative called Covax, designed to make sure every country in the world gets access to vaccines regardless of its ability to pay. In the fall of 2020, Covax set a clear goal: Buy 2 billion doses and make them available to nations in need before the end of 2021.