BRUSSELS—Europe’s fight to secure COVID-19 vaccine supplies intensified on Thursday when the European Union warned drug companies such as AstraZeneca that it would use all legal means or even block exports unless they agreed to deliver shots as promised.
The EU, whose member states are far behind Israel, the United Kingdom, and the United States in rolling out vaccines, is scrambling to get supplies just as the West’s biggest drugmakers slow deliveries to the bloc due to production problems.
