There is still a lot scientists do not know about Omicron. There is cautious optimism — but no certainty — about the effectiveness of vaccines against this fast-spreading variant of the coronavirus, and experts do not fully understand what it means for public health or the economy.But central banks have concluded they don’t have the luxury of waiting to find out.Facing surging inflation, three of the world’s most influential central banks — the Federal Reserve, Bank of England and European Central Bank — took decisive steps within 24 hours of each other to look past Omicron’s economic uncertainty.On Thursday, Britain’s central bank unexpectedly raised interest rates for the first time in more than three years as a way to curb inflation that has reached a 10-year high. The eurozone’s central bank confirmed it would stop purchases under a bond-buying program in March. The day before, the Fed projected three interest rate increases next ye …
