An Omicron sub-variant that is spreading rapidly in India and has been detected in several European countries may be more effective than other coronavirus strains at overcoming immunity provided by prior infection and vaccines. BA.2.75, which has been nicknamed...

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...