With the aim of analyzing the psychosocial impact of Covid-19 pandemic on society in general and health care workers in particular, we developed a 74-question survey questionnaire which was shared through social media. After analyzing 56,656 responses obtained during the first pandemic peak, the results showed an early and important negative impact on family finances, fear of working with Covid-19 patients and ethical issues related to Covid-19 care among healthcare workers (HCW). We have identified 7 target groups at higher risk of impaired mental health and susceptible to benefiting from an intervention: women, under 42 years of age, people with care burden, socio-economically deprived groups, people with unskilled or unqualified jobs, Covid-19 patients, and HCW working with Covid-19 patients. These results should encourage the active implementation of specific strategies to increase resilience in these groups and to prepare an adequate organizational response.