Omicron not less severe than earlier Covid-19 variants, large US study finds


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The Omicron variant of the Sars-CoV2 virus is intrinsically as severe as previous variants, according to a preprint version of a large US study that counters assumptions in other studies that it was more transmissible but less severe. The findings, which estimated Omicron’s severity after accounting for the impact of vaccines, should reinforce the importance of inoculations and booster shots, experts said. Vaccines helped keep hospitalisations and deaths relatively low during the Omicron surge compared with previous variants. The study, which is undergoing peer review at Nature Portfolio , was posted on Research Square on May 2. The authors, from...