The world economy is expected to contract by 5.2 percent this year - the worst recession in 80 years - but the sheer number of countries suffering economic losses means the scale of the downturn is worse than any recession in 150 years, the World Bank said in its latest Global Economic Prospects report. The depth of the crisis will drive 70 to 100 [million] people into extreme poverty - worse than the prior estimate of 60 million. Economists have been struggling to measure the impact of the crisis they have likened to a global natural disaster, but the sheer size of the impact across so many sectors and countries has made it hard to calculate, and made predictions about any recovery highly uncertain. Under the worst-case scenario, the global recession could mean a contraction of eight percent, according to the report. There remain some "exceptionally high" risks to the outlook, particularly if the current outbreaks linger or rebound, causing authorities to re-impose restrictions that could make the downturn as bad as eight percent. "Disruptions to activity would weaken businesses' ability to remain in operation and service their debt," the report cautioned. That, in turn, could raise interest rates for higher-risk borrowers and, "With debt levels already at historic highs, this could lead to cascading defaults and financial crises across many economies." But even if the 4.2 percent global recovery projected for 2021 materializes, "In many countries, deep recessions triggered by COVID-19 will likely weigh on potential output for years to come."