The European Union is pivoting to the Pfizer/BioNTech coronavirus shot with a record agreement to buy up to 1.8 billion doses, as court proceedings in its lawsuit against another major vaccine maker, AstraZeneca, began in Brussels on Wednesday.The European Union is pivoting to the Pfizer/BioNTech coronavirus shot with a record agreement to buy up to 1.8 billion doses, as court proceedings in its lawsuit against another major vaccine maker, AstraZeneca, began in Brussels on Wednesday.