AstraZeneca admits the best results in its COVID-19 vaccine study came from a dosing error, and experts are raising new questions about the shot

AstraZeneca admits the best results in its COVID-19 vaccine study came from a dosing error, and experts are raising new questions about the shot

Business Insider

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AstraZeneca described the error as "serendipity": The company mistakenly gave some patients a half-dose of the vaccine, leading to better results.

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