Researchers found people who had been vaccinated had a 7% risk of hospitalisation from BA.2, rising to 23% with BA.5
The BA.5 Omicron variant – now dominant in the UK – is more than three times as likely to put you in hospital than its predecessor BA.2,Portugese researchers found that people who had been vaccinated and boosted had a 7 per cent risk of hospitalisation from BA.2, rising to 23 per cent with BA.5 – suggesting they are 3.3 times more at risk.
“Our study suggests similar vaccine effectiveness against infection with BA.5 compared to BA.2,” Dr Kislaya said. As a result, those cases that are diagnosed are likely to be the more serious ones and so more likely to result in hospitalisation – giving a higher proportion of hospitalisations – while thousands of milder cases go undetected and are not included in the hospitalisation ratio calculations, he says.
“This isn’t to say BA.5 is associated with an increased risk of hospitalisation – but it’s early days yet,” he says. So although daily symptomatic cases in the UK are predicted to go as high as 650,000 a day in late Autumn – compared to the previous record of 351.546 – according to the– hospitalisations will still be well below the record level seen in January 2021, when more than 4,000 people a day were admitted to hospital and the second highest peak, in April 2020, when they reached 3,000.
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