NEUTRALIZING ANTIBODIES (NABS) AFTER IMMUNIZATION WITH GAM-COVID-VAC VACCINE IN A SAMPLE OF HEALTHCARE WORKERS - Emin, Melda; Ampova, Hristina; Elena Petrusevska Stanojevska; Irena Kostovska; Sonja Topuzovska; Jasna Bogdanska; Katerina Tosheska Trajkovska (My University, 2022)