Source: China – South China Morning PostImmunity 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, US researchers have found.Meanwhile another study, in South Africa, has suggested that an Omicron breakthrough infection after vaccination could offer protection against other strains – but that protection was not observed in unvaccinated people.In the US, the team from Ohio State University, led by Dr Shan-Lu Liu, examined the neutralising…Read More