L. T. Nhàn, T. T. Lợi, T. H. Việt, H. S. Dũng, and N. Đ. Công, “IMPACT OF COVID-19 VACCINE ON SEVERITY AND PROGRESSION OF ILLNESS IN COVID-19 INPATIENTS AT THE EASTERN MILITARY HOSPITAL”, JPMP175, no. 31, p. 11, June 2023.