Reuters with this:

• Researchers at Imperial College London compared 11,329 people with confirmed or likely Omicron infections with nearly 200,000 people infected with other variants.
• So far, according to a report issued ahead of peer review and updated on Monday, they see “no evidence of Omicron having lower severity than Delta, judged by either the proportion of people testing positive who report symptoms, or by the proportion of cases seeking hospital care after infection.”

There is more (bad) news at the link here.