A healthcare worker wearing a protective mask fills a syringe with a dose of the Pfizer-BioNTech Covid-19 vaccine at a large scale vaccination site in Sacramento, California, Feb. 4, 2021.
David Paul Morris | Bloomberg | Getty Images
Both versions of the vaccine need to be stored at very low temperatures. After thawing, the vaccine must be administered within hours. In addition, vaccine vials contain multiple doses.
Companies told The Wall Street Journal that they are planning to use waitlists and will consider vaccinating…