In this article, we studied how much of the restriction measures taken in the framework of the Covid-19 pandemic in South America, between March 2020 and April 2021, respond to the state of the democracies in the Region. The main argument is that this last variable, specifically its deterioration, is more important than others related to the dynamics of the pandemic, such as the increase in daily cases and deaths per million inhabitants. Although this hypothesis is partially verified, the effect is particularly sensitive to different national realities and cases, specifically Argentina, Colombia, Perú y Chile. Models with non-linearity adjustments and differentiated intercepts were used in the estimation.