While sweeping curbs have brought Covid’s spread under control for now in China’s two most important cities, the virus has evolved to become far more contagious, said Ben Cowling, chair of epidemiology at The University of Hong Kong’s School of Public Health. That means it’s likely to flare up again and again, making it more difficult to control than it was last year when a less transmissible strain was spreading, he said.
“Beijing and other cities in China would need to be prepared to implement outbreak control measures more often in the coming year than in 2021 because of the increased transmissibility of the virus over time,” Cowling said.