What is the severity of SARS-CoV-2 Omicron BA.4 and BA.5 variant infections in relation to BA.2 infections?

Researchers compared clinical outcomes of COVID-19 cases due to SARS-CoV-2 Omicron BA.2 and Omicron BA.4/BA.5 variants based on the Kaiser Permanente Southern California (KPSC) health records between April 29 and July 2, 2022.