inclusion criteria: * specialist physicians, resident physicians, medical students, and nursing personnel who work at the san ignacio university hospital. * subjects of any sex over 18 years of age who work as health care personnel, in care services that care for patients with a suspected or confirmed diagnosis of covid-19 and who are active during the study recruitment. * that they have not presented general symptoms such as malaise, fever, cough, dyspnea or muscle pain during the last 7 days. * subjects negative to the antigen test for covid-19.

inclusion criteria: * specialist physicians, resident physicians, medical students, and nursing personnel who work at the san ignacio university hospital. * subjects of any sex over 18 years of age who work as health care personnel, in care services that care for patients with a suspected or confirmed diagnosis of covid-19 and who are active during the study recruitment. * that they have not presented general symptoms such as malaise, fever, cough, dyspnea or muscle pain during the last 7 days. * subjects negative to the antigen test for covid-19.

inclusion criteria: - specialist physicians, resident physicians, medical students, and nursing personnel who work at the san ignacio university hospital. - subjects of any sex over 18 years of age who work as health care personnel, in care services that care for patients with a suspected or confirmed diagnosis of covid-19 and who are active during the study recruitment. - that they have not presented general symptoms such as malaise, fever, cough, dyspnea or muscle pain during the last 7 days. - subjects negative to the antigen test for covid-19.

inclusion criteria: - specialist physicians, resident physicians, medical students, and nursing personnel who work at the san ignacio university hospital. - subjects of any sex over 18 years of age who work as health care personnel, in care services that care for patients with a suspected or confirmed diagnosis of covid-19 and who are active during the study recruitment. - that they have not presented general symptoms such as malaise, fever, cough, dyspnea or muscle pain during the last 7 days. - subjects negative to the antigen test for covid-19.