Third Major Vaccine Candidate Starting Phase 3 Trial In U.S.

AstraZeneca's COVID-19 vaccine, developed with Oxford University, has entered phase three trials in the US, involving up to 30,000 participants. This trial is similar in scale to those of Moderna and Pfizer, which began in July.

What is the significance of AstraZeneca's vaccine candidate starting a phase three trial in the US?

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What does it mean for a vaccine to be in its final stage of testing?

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In partnership with which institution was the AstraZeneca vaccine developed?

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How many Americans are expected to be involved in the AstraZeneca vaccine study?

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How does the size of the AstraZeneca trial compare to those of Moderna and Pfizer?

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