A group from Health Intelligence, Western Cape Government: Health and Wellness, South Africa, etc. has reported about disease severity of omicron lineages BA.4/BA.5.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9258293/
Among 3,793 patients from the BA.4/BA.5 wave and 190,836 patients from previous waves the risk of severe hospitalization/death was similar in the BA.4/BA.5 and BA.1 waves (adjusted hazard ratio [aHR] 1.12; 95% confidence interval [CI] 0.93; 1.34). Both Omicron waves had lower risk of severe outcomes than previous waves (Ancestral, beta, and delta).
