Introduction: Temporary disability due to COVID-19 was expressly regulated, through various rules and instructions, covering both isolation by contact, by infection or for sensitive workers. It involved the integration of preventive labor protection covered by its protection in a financial benefit with the highest amount. Analyzing the consequences of the pandemic in the first wave, confinement, de-escalation and return to normality, months from March to October, the «collapsing» impact of COVID-19 on the health system led to the paralysis and increase of waiting lists for tests, operations and non-urgent consultations of the rest of pathologies, and consequently a high increase in the average duration of sick leave for all processes, in confinement and de-escalation in 84.48% and in 25.27% the prolonged casualties that reached more than 365 days. Consequently, COVID-19 as a collateral effect led to a poor evolution of the rest of the processes, prolonging the duration of temporary disabilities, which implies a worsening of occupational health, a greater risk of not returning to work that occurs during sick leave long, higher risk of unemployment, higher spending on benefits and economic decline for companies and the self-employed. Temporary disability due to COVID-19 accounted for 38.73% of all casualties at the end of October 2020.