https://www.bostonglobe.com/2020/09/06/metro/why-sign-up-take-an-experimental-vaccine-participants-coronavirus-trials-say-they-have-mission/
https://www.bostonglobe.com/2020/09/06/metro/why-sign-up-take-an-experimental-vaccine-participants-coronavirus-trials-say-they-have-mission/
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Why sign up to take an experimental vaccine? Participants in coronavirus trials say they have a mission - The Boston Globe
Three prospective coronavirus vaccines have entered the late-stage clinical trials in the United States, each enrolling 30,000 people.
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