Good enough for Britain. Good enough for the European Union. Not good enough for the United States.

That’s what the U.S. Food and Drug Administration thinks about the evidence for the Oxford-developed, AstraZeneca-made COVID-19 vaccine: the cheap, refrigerator-friendly, easy-to-transport injection that, so far at least, is 100% successful at keeping people with COVID-19 out of the hospital. The Oxford vaccine has been given to more than a million British citizens, and the EU is now scrambling to find as many doses as it can to compensate for its own slow vaccine rollout.