DAVID LAWDER THE COVID-19 pandemic will continue to swell global public debt in 2021, but spending more money to accelerate vaccinations is the fastest way to start to normalize government finances, the International Monetary Fund said on Wednesday. The IMF said in its 2021 Fiscal Monitor report that if faster global vaccinations bring the virus under control sooner, more than $1 trillion in additional global tax revenue could be collected through 2025 in advanced economies. If that same upside scenario in the Fund's economic forecasts materializes, global GDP output could increase by $9 trillion during the same period as businesses…