Big study of ~70k Covid cases showing Omicron's far lower severity of outcomes vs Delta

Symptomatic hospitalisation -53%
Median hospital stay length -70%
ICU admission -74%
Mortality -91%

Major effects among both vaccinated and unvaccinated patients.https://t.co/xxxlYanRVL pic.twitter.com/3fsdd1OLIR

— Mike Bird (@Birdyword) January 12, 2022