Posted in Web Pfizer COVID vaccine ingredient list: ‘Nothing too … December 17, 2020 The only active ingredient in the vaccine is the messenger RNA encoding the viral spike of SARS-CoV-2. This describes the modified mRNA that contains the code for cells to make the spike protein… https://www.usatoday.com/story/news/health/2020/12/12/pfizer-covid-vaccine-ingredient-list-nothing-too-surprising-there/6520511002/