On Tuesday, the journal Nature Medicine published a new study finding China faces a “tsunami” of COVID-19 cases if it abandons its zero-COVID policy. Researchers at a university in Shanghai estimate that, left unchecked, the Omicron variant could cause over 110 million cases of disease through July, with over 5 million hospital admissions and 1.6 million deaths. Public health officials warn just six in 10 older adults in China have gotten a booster shot. Also, the Sinovac and Sinopharm vaccines widely used in China are significantly less effective than the mRNA shots produced by Pfizer and Moderna.