Omicron seems to carry higher Covid reinfection risk, says South Africa

Scientists warn of higher rate of repeat infections but say vaccines appear to protect against serious illness

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The Omicron variant of Covid-19 appears to be reinfecting people at three times the rate of previous strains, experts in South Africa have said, as public health officials and scientists from around the world closely monitor developments in the country where Omicron was first identified.

As the EU's public health agency warned that Omicron could cause more than half of all new Covid infections in Europe within the next few months, evidence was emerging, however, that vaccines still appear to offer protection against serious illness.