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The Science Behind The Historic mRNA Vaccine

15:32
Sandra Lindsay, left, a nurse at Long Island Jewish Medical Center, is inoculated with the Pfizer-BioNTech COVID-19 vaccine by Dr. Michelle Chester, Monday, Dec. 14, 2020. (AP)
Sandra Lindsay, left, a nurse at Long Island Jewish Medical Center, is inoculated with the Pfizer-BioNTech COVID-19 vaccine by Dr. Michelle Chester, Monday, Dec. 14, 2020. (AP)

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