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  1. mRNA Technology: What It Is and How It Works - Pfizer

  2. Pfizer and BioNTech Provide Update on mRNA-based …

  3. FDA Approves and Authorizes Updated mRNA COVID-19 Vaccines

  4. Pfizer and BioNTech Announce Positive Topline Data for mRNA ...

  5. FDA Approves First COVID-19 Vaccine | FDA - U.S. Food and ...

  6. Pfizer–BioNTech COVID-19 vaccine - Wikipedia

  7. How the Pfizer-BioNTech Vaccine Works - The New York Times