  This paper has the goal of evaluating how changes in mobility has affected
the infection spread of Covid-19 throughout the 2020-2021 years. However,
identifying a "clean" causal relation is not an easy task due to a high number
of non-observable (behavioral) effects. We suggest the usage of Google Trends
and News-based indexes as controls for some of these behavioral effects and we
find that a 1\% increase in residential mobility (i.e. a reduction in overall
mobility) have significant impacts for reducing both Covid-19 cases (at least
3.02\% on a one-month horizon) and deaths (at least 2.43\% at the two-weeks
horizon) over the 2020-2021 sample. We also evaluate the effects of mobility on
Covid-19 spread on the restricted sample (only 2020) where vaccines were not
available. The results of diminishing mobility over cases and deaths on the
restricted sample are still observable (with similar magnitudes in terms of
residential mobility) and cumulative higher, as the effects of restricting
workplace mobility turns to be also significant: a 1\% decrease in workplace
mobility diminishes cases around 1\% and deaths around 2\%.
