EditorialLynn Peffer, wearing gloves that allow her to handle ultra cold materials, holds two vials of the Pfizer-BioNTECH COVID-19 vaccine in the pharmacy at Children's Hospital of Pittsburgh, part of the University of Pittsburgh Medical Center system in Pittsburgh on Dec. 14, 2020. (Kristian Thacker/The New York Times)
EditorialLynn Peffer, wearing gloves that allow her to handle ultra cold materials, holds two vials of the Pfizer-BioNTECH COVID-19 vaccine in the pharmacy at UPMC Children's Hospital of Pittsburgh on Monday, Dec. 14, 2020, in Pittsburgh. (Kristian Thacker/The New York Times)