In recent years, the main problem to be solved by the whole world has been the Covid-19 pandemic. Most countries have taken measures aimed at reducing mobility as the main tool in the fight against the spread of the virus. This article presents of a case study of the impact of mobility in contagions for the municipality of Málaga, Spain. Preliminary results are presented. Aggregated point of sale purchase registers are used as mobility data within the area of study. The obtained results hint that commercial activity is not the main vector of contagion on the available data on Málaga, although the data volume is insufficient to draw a sharp conclusion.