The quality of sleep, one of the determinants of public health, was adversely affected by the lockdown. Our study points out that nearly all individuals who experienced a change in their sleep reported poor quality of the same. This result is plausible, considering the fast disruption of routine caused by the pandemic. In fact, individuals’ well-being may have been seriously affected when both personal and public safety are no longer predictable, regardless of their resilience and their capacity for adaptation in daily life.