Ratshikhopha E, Muvhali M, Naicker N, Tlotleng N, Jassat W, Singh T. Disease Severity and Comorbidities among Healthcare Worker COVID-19 Admissions in South Africa: A Retrospective Analysis. Int J Environ Res Public Health. 2022;19(9). https://mdpi-res.com/d_attachment/ijerph/ijerph-19-05519/article_deploy/ijerph-19-05519.pdf?version=1651476070