Abstract
Serological tests for the detection of specific antibodies to SARS‐CoV‐2 are an important tool both for confirming the diagnosis and for the epidemiological investigations. Comparative analysis of ELISA test kits for qualitative determination (yes/no) of IgG antibodies to SARS-CoV-2 available for purchase in the Republic of Belarus was done. The study included four commercial kits of various manufacturers: Vector-Best, Russia; N.F.Gamalei Research Center, Russia; Algimed, Belarus; Wuhan Fine Biotech, China. All test kits showed high quality in detection of specific IgG. The kits produced by Vector-Best, Russia, and Wuhan Fine Biotech, China had the highest sensitivity (100.0%); the kits produced by Algimed, Belarus, had the greatest specificity (100.0%). The dependence between the optical density of the samples and the concentration of IgG to SARS-CoV-2 was evaluated. The results showed that it is not possible to make a conclusion about the amount of antibodies based on the optical density of the sample in the test kits designed for their qualitative determination.
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