Omicron infection after vaccination may protect against other coronavirus strains, study finds

An Omicron breakthrough infection after vaccination could offer protection against other strains – but that protection was not observed in unvaccinated people, a study in South Africa, has suggested.Meanwhile, another study, in the US, found that immunity from a breakthrough Covid-19 case caused by other variants – after two doses of an mRNA vaccine – will not be enough to stop an Omicron infection.In the US, the team from Ohio State University, led by Dr Shan-Lu Liu, examined the neutralising…

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