required Pfizer and Moderna provide two months of follow-up data. If studies are cut short, it becomes harder to get long-term effects, including how long immunity lasts. “There’s a reason we do clinical research in a certain way," Iltis said. "We should not abandon our norms and our principles.
Are we going to be happy with short-term evidence in a year?”WHAT THE COMPANIES SAYPfizer plans to eventually vaccinate all its study participants.
It's opting for a more gradual, voluntary process. The company will offer that option to those who got dummy shots as soon as they would have access to the vaccine outside of the study.Moderna is considering immediately offering the vaccine to all who got dummy shots.
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