DYNAMICS OF COVID-19 SPECIFIC G-CLASS IMMUNOGLOBULINS LEVELS IN PATIENTS AFTER THE RECOVERY

Abstract

Introduction. This article is devoted to determining the level of protective antibodies of the patients at the early and further stages after being suffered from COVID-19. Materials and methods. On the first stage of the research 66 patients of different age and gender were examined. All patients, with no exception, had positive PCR results on COVID-19. All patients were relatively divided into two age groups: from 18 to 39 (n = 39) and from 40 to 65 (n = 27). The light form of disease was detected in 40 patients, the moderate form – in 15 and the severe one – in other 3 patients. 8 people were ill without symptoms. There were 11 patients hospitalized at the department of infectious diseases of the hospital. Afterwards the level of the antibodies was controlled on the 60th, 90th and 150th day after the onset. All patients were tested for antibodies to COVID-19 by enzyme-linked immunosorbent assay (ELISA) performed on the equip- ment: enzyme-linked immunosorbent assay Tecan (Austria); PW 40 Microplate Washer (France). ELISA set for serology COVID-19 test system IgG SARS-CoV-2 VitroTest (Ukraine). Results. Analyzing the data obtained via laboratory research, it can be seen that the immune response to COVID-19 was formed in 82 % of the examined patients. The maximum level of antibodies, which remains as such up to 40th day. Results. IgG increases from 12 to 40 days and then has not changed significantly for 60; 90 and 150 days. Only 4 patients had a noticeable decrease on day 150 (however, they still had a positive level). Conclusion. IgG levels in patients with Sars-Cov2 remain high for at least 150 days. The formation of antibodies is not affected by the age difference, neither depends on the severity of the disease.