Critical care admission with SARS-CoV2;Demonstrate COVID- 19 disease incidence among Health care workers:;Demonstrate cumulative incidence of hospitalization for COVID-19 among Health care workers:;Demonstrate the Incidence of specific Antibodies against SARS-CoV-2 at 3 and 6 months in health care workers;Hospitalization of severe disease COVID-19;Oxygen supplementation in severe disease COVID-19;Mortality associated to progressive pulmonary disease;Need for intubation or non-invasive ventilation for the patient.

Critical care admission with SARS-CoV2;Demonstrate COVID- 19 disease incidence among Health care workers:;Demonstrate cumulative incidence of hospitalization for COVID-19 among Health care workers:;Demonstrate the Incidence of specific Antibodies against SARS-CoV-2 at 3 and 6 months in health care workers;Hospitalization of severe disease COVID-19;Oxygen supplementation in severe disease COVID-19;Mortality associated to progressive pulmonary disease;Need for intubation or non-invasive ventilation for the patient.