https://www.siliconvalley.com/2020/12/23/pfizer-to-supply-us-with-additional-100m-vaccines-doses/ > By JONATHAN LEMIRE and RICARDO ALONSO-ZALDIVAR | The Associated Press > WASHINGTON  — Pfizer and BioNTech will supply the U.S. with an additional 100 million doses of their COVID-19 vaccine under a second agreement.