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On what day of December 2020 did the US FDA grant emergency use authorisation to the Pfizer-BioNTech vaccine? Answer with the day of the month as a whole number only.

Answer

11
day_of_month
The Gregorian calendar day number in December 2020 on which FDA issued the Pfizer-BioNTech vaccine's initial EUA.
sources
www.fda.gov, en.wikipedia.org, fda press announcement 'fda takes key action in fight against covid-19 by issuing emergency use authorization for first covid-19 vaccine', dated december 11, 2020 (fda.gov), fda press announcement, 'fda takes key action in fight against covid-19 by issuing emergency use authorization for first covid-19 vaccine', dated december 11, 2020 (fda.gov), fda press announcement, december 11, 2020: 'fda takes key action in fight against covid-19 by issuing emergency use authorization for first covid-19 vaccine' (fda.gov), fda press release "fda takes key action in fight against covid-19 by issuing emergency use authorization for first covid-19 vaccine", dated december 11, 2020 (fda.gov), fda press release "fda takes key action in fight against covid-19 by issuing emergency use authorization for first covid-19 vaccine", dated december 11, 2020 (fda.gov); corroborated by contemporaneous reporting (e.g. reuters, "fda authorizes pfizer/biontech covid-19 vaccine for emergency use", december 11, 2020)., fda press release "fda takes key action in fight against covid-19 by issuing emergency use authorization for first covid-19 vaccine", issued december 11, 2020 (fda.gov), fda press release "fda takes key action in fight against covid-19 by issuing emergency use authorization for first covid-19 vaccine", published by the u.s. food and drug administration on december 11, 2020 (fda.gov), fda press release "fda takes key action in fight against covid-19 by issuing emergency use authorization for first covid-19 vaccine", published by the u.s. food and drug administration, dated december 11, 2020 (fda.gov), fda press release 'fda takes key action in fight against covid-19 by issuing emergency use authorization for first covid-19 vaccine', dated december 11, 2020 (fda.gov); corroborated by the fda's pfizer-biontech eua letter to pfizer inc., also dated december 11, 2020, fda press release, "fda takes key action in fight against covid-19 by issuing emergency use authorization for first covid-19 vaccine", dated december 11, 2020 (fda.gov), fda press release, "fda takes key action in fight against covid-19 by issuing emergency use authorization for first covid-19 vaccine", published december 11, 2020 (fda.gov), fda press release, "fda takes key action in fight against covid-19 by issuing emergency use authorization for first covid-19 vaccine," dated december 11, 2020 (fda.gov), fda press release, 'fda takes key action in fight against covid-19 by issuing emergency use authorization for first covid-19 vaccine' (fda.gov, dated december 11, 2020), fda press release, 'fda takes key action in fight against covid-19 by issuing emergency use authorization for first covid-19 vaccine', dated december 11, 2020 (fda.gov), fda press release, 'fda takes key action in fight against covid-19 by issuing emergency use authorization for first covid-19 vaccine', december 11, 2020 (fda.gov), fda press release, 'fda takes key action in fight against covid-19 by issuing emergency use authorization for first covid-19 vaccine,' dated december 11, 2020 (fda.gov), fda press release, december 11, 2020: 'fda takes key action in fight against covid-19 by issuing emergency use authorization for first covid-19 vaccine' (fda.gov), fda, coronavirus disease 2019 (covid-19) timeline, 12/11/2020 entry: https://www.fda.gov/emergency-preparedness-and-response/public-health-preparedness-and-response/coronavirus-disease-2019-covid-19, fda, pfizer-biontech covid-19 vaccine eua letter of authorization: https://www.fda.gov/media/144412/download (states issued december 11, 2020), fda.gov press announcement "fda takes key action in fight against covid-19 by issuing emergency use authorization for first covid-19 vaccine", dated december 11, 2020 (https://www.fda.gov/news-events/press-announcements/fda-takes-key-action-fight-against-covid-19-issuing-emergency-use-authorization-first-covid-19), fda.gov press release "fda takes key action in fight against covid-19 by issuing emergency use authorization for first covid-19 vaccine", dated december 11, 2020, u.s. fda, emergency use authorization—archived information (pfizer-biontech covid-19 vaccine | 12/11/2020), https://www.fda.gov/emergency-preparedness-and-response/mcm-legal-regulatory-and-policy-framework/emergency-use-authorization-archived-information

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    #187111FDA press release, 'FDA Takes Key Action in Fight Against COVID-19 By Issuing Emergency Use Authorization for First COVID-19 Vaccine', dated December 11, 2020 (fda.gov)
    #73511FDA press release "FDA Takes Key Action in Fight Against COVID-19 By Issuing Emergency Use Authorization for First COVID-19 Vaccine", published by the U.S. Food and Drug Administration on December 11, 2020 (fda.gov)
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