This page mentions a study in China: https://www.worldometers.info/coronavirus/coronavirus-symptoms/#mild https://www.worldometers.info/coronavirus/coronavirus-

This page mentions a study in China: https://www.worldometers.info/coronavirus/coronavirus-symptoms/#mild https://www.worldometers.info/coronavirus/coronavirus-sympto... I haven't found exactly the 10% in ICU (and I'd be especially interested in the percentage of young people requiring ICU), but yeah basically 80% mild cases and the others needing assistance.