Global disease experts say little is known about China's experience with long-term COVID effects thought to have afflicted millions with debilitating fatigue, brain fog and other symptoms
Russia confirmed 113,122 new daily infections, setting a record high for a ninth consecutive day, which the authorities blame on the spread of the omicron variant.
Russia's coronavirus task force said that 668 deaths had been confirmed in the past 24 hours, after Russia's coronavirus death toll exceeded 700,000 on Friday.