Scientists urge China to replace its faltering Covid vaccines

Scientists are urging China to look for alternatives to its two homegrown Covid-19 vaccines to tackle its Omicron outbreak, amid mounting concerns about the jabs’ efficacy against the variant. The country is struggling with two problems as it faces its worst Covid-19 surge since the start of the pandemic: the sluggish take-up of booster doses — authorities said this week that only 57 per cent of people over 60 have been fully vaccinated with three jabs — and homegrown vaccines that are much less effective than foreign-produced jabs.