A vaccine exists to combat the virus. The vaccine appears to work. And not just work — the vaccine Pfizer and BioNTech have invented seems to work spectacularly well. The vaccine is apparently 90 per cent effective in preventing Covid. infections. (This is a big number. By comparison, the flu vaccine is 40-60 percent effective). The vaccine may even be manufactured in Ireland. The vaccine will be the most in-demand product on planet Earth, but Pfizer thinks they will be able to produce 50 million doses by the end of the year. And remember, there are other vaccine trials just…