HONG KONG : As Western economies roar back to life, a fresh wave of Covid-19 clusters in Asia—where vaccination campaigns remain in their early stages—is creating new bottlenecks in the global supply chain, threatening to push up prices and weigh on the post-pandemic recovery.An outbreak at one of the world’s busiest ports in southern China has led to global shipping delays, while infections at key points in the semiconductor supply chain in Taiwan and Malaysia are worsening a global chip shortage that has hindered production in the auto and technology industries.The new headaches add to inflation concerns, after China and the U.S.