Ozdemir, Yusuf Emre, et al. “Real-Life Evaluation of Incidence and Clinical Outcomes of COVID-19 Among Healthcare Workers During Pre-Vaccination and Post-Vaccination Periods: A Cross-Sectional Impact Study”. The Journal of Infection in Developing Countries, vol. 17, no. 03, Mar. 2023, pp. 286-92, doi:10.3855/jidc.17206.