The Omicron variant of Covid-19 is much less likely than Delta to result in long Covid in people who have had two doses of vaccine, new figures in the UK suggest. Data shows the odds of double-vaccinated adults infected with the Omicron BA.1 strain reporting having long Covid four to eight weeks later were 50% lower than those who had Delta. The experimental statistics, published in May, also suggest there is no evidence of a difference in risk of long Covid between first infections with Delta compared to the Omicron BA.1 and BA.2 variants among triple-vaccinated adults. But Britain’s Office f…