Early studies suggest a reduced risk of Covid-19 hospitalization when infected with Omicron compared to Delta

Two new preprint papers add to the growing evidence that the Omicron coronavirus variant may be less likely to cause severe disease and hospitalization compared to the Delta variant. Omicron is associated with a two-thirds reduction in the risk of Covid-19 hospitalization compared with Delta, suggests one study, released online Wednesday as a working paper by researchers at the University of Edinburgh in the United Kingdom. That research was based out of Scotland.
The other paper, posted Tuesday to the online server medrxiv.org, suggests that people with Omicron infections have had 80% lower odds of being admitted to the hospital compared with Delta infections. But once a patient was hospitalized, there was no difference in the risk of severe disease, according to that research, based out of South Africa. Both studies include preliminary data and have not yet been published in a peer-reviewed journal.
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