INTRODUCTION

: The vaccination in the province of Buenos Aires has initiated with the health care workers (HCW). The present work aims to evaluate the impact of vaccination on the evolution of confirmed SARS- CoV2 cases in HCW compared to that of the general population (GP).

METHODS

: The study design is descriptive observational of series were developed confirmed cases, period April 2020 to March 2021. The Sistema Nacional de Vigilancia en Salud (SNVS), and VacunatePBA were used. The grade immunization was estimated at 14 days from the application of the first dose.

RESULTS

: As of September, the number of cases begins to decrease more sharply in HCW than in the general population. By February 2021, 42% of the HCW had been immunized with the first dose (FD) and 24% with the second dose (SD), while in GP only 0.06% had been immunized with FD and 0% of SD. In March, while the number of GP cases increased by 10% compared to February (only 2% immunized), HCW decreased by 35% (95% immunized). This indicates a significant decrease between the new cases of February and March in HCW (p-value <0.00001).

DISCUSSION:

Since the introduction of COVID-19 vaccines at the end of December in different countries, a decrease in new cases of COVID-19 in HCW has begun to be reported. The present work describes a relative decrease in HCW cases in a post-vaccination context in the province of Buenos Aires, providing the first data in the country on the impact of COVID-19 vaccines on HCW.

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