China Covid cases at 2-year high

China posted a steep jump in daily Covid infections on Tuesday, with new cases more than doubling from a day earlier to hit a two-year high, raising concerns about the rising economic costs of its tough measures to contain the disease.

A total of 3,507 domestically transmitted cases with confirmed symptoms were reported on Monday across more than a dozen provinces and municipalities, up from 1,337 a day earlier, the National Health Commission said.

Though China's caseload is still tiny by global standards, health experts said the increase in daily infections over the next few weeks would be key to determine whether its "dynamic zero-COVID" approach, of containing each outbreak quickly as it arises, remains effective against the rapidly spreading Omicron variant.