WASHINGTON – The head of the International Monetary Fund said Thursday that the while the United States and other major economies turned in better-than-expected economic performances in the third quarter, the world now faces slower momentum with a resurgence in coronavirus cases.IMF Managing Director Kristalina Georgieva said in a note prepared for a virtual meeting of the leaders of the Group of 20 major economies that significant progress on the vaccines raised “hopes of vanquishing the virus that has taken more than a million lives and caused tens of millions of job losses” around the world.The G-20 virtual leaders summit, which Saudi Arabia is conducting this week in its role as this year's head of the G-20, will focus on efforts to.