The arms-length relationship between Pfizer and the US government’s Operation Warp Speed has stiffened as they negotiate terms for a contract option for a second tranche of 100 million doses of the Pfizer Inc./BioNTech SE COVID-19 vaccine.
Government officials are saying the negotiation turns on how soon Pfizer could produce the additional doses, and are suggesting that if Pfizer commits to delivering them by the second quarter...