Moves by several countries to mandate COVID-19 tests for passengers arriving from China reflect global concern that new variants could emerge in its ongoing explosive outbreak — and that the government may not inform the rest of the world quickly enough.
There have been no reports of new variants to date, but China has been accused of not being forthcoming about the virus since it first surfaced in the country in late 2019. The worry is that it may not be sharing data now on any signs of evolving strains that could spark fresh outbreaks elsewhere.
