Immunity Against the COVID-19 Vaccine in Healthcare Workers of Buenos Aires, Argentine.

Vaccination against coronavirus disease 19 (COVID-19) is an essential primary prevention tool to limit the health and economic effects of the pandemic. The Ministry of Health of the Nation, designed the "Strategic Plan for vaccination", which the first line being the health workers " The National Administration of Medicines, Food and Medical Technology authorized two emergency vaccines for administration, Sputnik V and Sinopharm vaccine. It is important to evaluate immunogenicity and its correlation with the long-term efficacy and safety profile of this vaccines.

Objectives: To determine the variation in the levels of Immunoglobulin G (IgG) antibodies in health workers who received a COVID-19 vaccine between the time before the first dose, and after 1 month, 6 months and 12 months after the completion of the immunization, depending on whether they have received the Sputnik V vaccine or the Sinopharm vaccine, and correlate the Immunoglobulin G levels with the presence of adverse events and infection with COVID-19 Methodology: Design: observational and analytical study of a prospective cohort of healthcare workers immunized with some COVID-19 vaccine. The presence of IgG will be determined qualitatively and quantitatively. The immunoglobulin G titer in each period will be compared globally and according to the type of vaccine administered.