Fed Chief Says Delta Variant Can Pose Risks to US economy An upsurge in new coronavirus variants and poor access to vaccines in developing countries threaten the global economic recovery, finance ministers of the world's 20 largest economies warned on Saturday. The G20 gathering in the Italian city of Venice was the ministers' first face-to-face meeting since the start of the pandemic. Decisions include the endorsement of new rules aimed at stopping multinationals shifting profits to low-tax havens. That paves the way for G20 leaders to finalise a new global minimum corporate tax rate of 15% at a Rome summit in October, a move that could recoup hundreds of billions of dollars for public treasuries straining under the COVID-19 crisis.