Pfizer also need 2 doses > "which consists of a 2-dose schedule" [0] [0] https://www.pfizer.com/news/press-release/press-release-detail/pfizer-and-biontech-an

Pfizer also need 2 doses > "which consists of a 2-dose schedule" [0] [0] https://www.pfizer.com/news/press-release/press-release-detail/pfizer-and-biontech-announce-vaccine-candidate-against https://www.pfizer.com/news/press-release/press-release-deta...