Last week the United Kingdom became the first country to approve an updated COVID-19 booster directed at two different strains of the coronavirus. The “bivalent” booster, made by Moderna, will have the same dose of messenger RNA as the...

China has locked down Chengdu, one of its biggest and most economically important cities, as it turns once again to its COVID strategy of restricting people’s movements to stop outbreaks. www.nytimes.com/2022/09/01/world/asia/china-covid-lockdown-chengdu.html Starting at 6 p.m. last Thursday, residents in the...