https://www.cnbc.com/2022/02/07/chinas-zero-covid-policy-will-not-work-with-omicron-epidemiologist.html

China is "uniquely at risk" to omicron, Osterholm said, for a combination of reasons: Early studies suggest its Sinovac and Sinopharm vaccines are "not very effective" against the variant, and at the same time China's success at preventing the spread of Covid so far means it has a very large population that remains vulnerable.