As some reports would have it, this is the beginning of the end. Three coronavirus vaccines have posted excellent results, with more expected to come.

But this is not the beginning of the end; it is only the beginning of an endless wait: There aren't enough vaccines to go around in the richest countries on earth, let alone the poorest ones. That's why it makes little sense that the United States, Britain and the European Union, among others, are blocking a proposal at the World Trade Organisation (WTO) that would allow them, and the rest of the world, to get more of the vaccines and treatments we all need.