Changing Strategy, the E.U. Bets Big on Pfizer to Battle Covid April 14, 2021 Auto Bot AstraZeneca PLC, Blood Clots, Europe, Pfizer Inc, Vaccination and Immunization, von der Leyen, Ursula 0 After an early focus on AstraZeneca and months of turmoil, the European Union is pivoting away from the company’s vaccine. It has reached agreement for a faster rollout of the Pfizer-BioNTech shot.