China Finds No New Variants Despite Massive New Year Migration.

Several countries re-instituted testing requirements for travelers coming from China after Beijing dismantled its Covid restrictions in one fell swoop in early December. (Bloomberg) -- No new Covid-19 variants were detected in China during the Lunar New Year holiday when millions of people returned to their hometowns, a mass migration that potentially helped the virus spread in the world's most populous country. [Extracted from the article]