COVID vaccinesChina's quest for mRNA vaccine hits stumbling block in omicron
Limited effectiveness of conventional shots puts 'zero-COVID' policy at risk
A medical worker walks past a sign at a coronavirus vaccination site in Beijing. © Reuters
SHIN WATANABE, Nikkei staff writer
DALIAN, China -- China continues to struggle in developing a homegrown mRNA vaccine against COVID-19, with its front-runner failing to reach the market by the end of last year as hoped and now showing disappointing results against the highly infectious omicron variant.