《Financial Times》Omicron cases less likely to require hospital treatment, studies show
https://on.ft.com/3Fo6d14
《The Guardian》Risk of hospital stay 40% lower with Omicron than Delta, UK data suggests
https://www.theguardian.com/world/2021/dec/22/risk-of-hospital-stay-40-lower-with-omicron-than-delta-uk-data-suggests