Clinical severity of COVID-19 in patients admitted to hospital during the omicron wave in South Africa: a retrospective observational study by Waasila Jassat, FCPHM, Salim S Abdool Karim, ProfPhD, Caroline Mudara, MSc, Richard Welch, BSc, Lovelyn Ozougwu, MSc, Michelle J Groome, PhD, Nevashan Govender, MSc, Anne von Gottberg, ProfPhD, Nicole Wolter, PhD, Milani Wolmarans, BOT, Petro Rousseau, MPH, Lucille Blumberg, DScMed, Cheryl Cohen, ProfPhD

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