Ninashvili , N., et al. “PREVALENCE OF COVID-19 SYMPTOMSIN HOSPITALIZED AND NON-HOSPITALIZED PATIENTS ANDPREDICTIVE FACTORS ASSOCIATEDWITH SEVERITY OF COVID-19:A LITERATURE REVIEW”. Collection of Scientific Works of Tbilisi State Medical University, vol. 55, Feb. 2023, pp. 123-7, https://journals.4science.ge/index.php/CSW/article/view/1440.