Pfizer spokeswoman Amy Rose declined to confirm or deny the information and said that beyond the first 100 million doses the U.S. has secured, a separate agreement would have to be created. “The company is not able to comment on any confidential discussions that may be taking place with the U.S. government,” Rose said.
https://www.washingtonpost.com/health/2020/12/07/pfizer-vaccine-doses-trump/