The Biden administration announced Wednesday that it will require anyone arriving by air from China to provide a negative Covid test, following a surge of Covid-19 cases across China as Beijing has eased its strict zero-Covid rules.

Under the new rules, which will take effect on Jan. 5, anyone two years and older will need to show a negative result from a test taken within two days of their departure from airports in mainland China, Hong Kong and Macau, administration officials told reporters in a briefing.

The move reflects the Biden administration’s alarm about the potential spillover of new Covid variants linked to soaring Covid infections in China. The Chinese government ended its draconian Covid-zero policy — hinged to mass testing, tracing and lockdowns — on Dec. 7 following mass protests in November fueled by anger about the strategy.