The International Monetary Fund is expecting a stronger economic recovery in 2021 as Covid-19 vaccine rollouts get underway, but it warns of “daunting challenges” given the different rates of administering shots across the globe. The organization said Tuesday it expects the world economy to grow by 6% in 2021, up from its 5.5% forecast in January. Looking further ahead, global GDP for 2022 is seen increasing by 4.4%, higher than an earlier estimate of 4.2%.