It has been demonstrated that health epidemics and living situations during lockdowns (e.g., overcrowding and lack of privacy, social isolation, loss of income, etc.), pose high risks in terms of mental health, in particular concerning anxiety (fear of oneself or of one’s relatives falling ill, frustration, anger, etc.).
It has therefore been a public health priority to monitor population mental health, and especially to prevent the development of mental ill-health. In the short term, it was important to ensure that the health system, in particular hospitals and emergency services, was not overloaded, as it struggled to cope with the impact of the pandemic.