Albert Bourla, Pfizer CEO, said that trial data for the youngest age-group, 6 months to two years, would be ready to show to the FDA by November.

Trial data from Pfizers coronavirus vaccine for the youngest age-group, 6 months to 2 years, would be ready to show to the FDA later this year.
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https://www.businessinsider.com/pfizer-covid-vaccine-trial-data-kids-aged-2-to-11-by-september-2021-5

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