inclusion criteria: * hospitalized patients aged ≥18 years. * confirmed diagnosis of covid-19 by rt-pcr or antigen test in respiratory samples. * time between symptom onset and inclusion ≤ 7 days. * enrolled within 5 days of hospitalization. * sign the consent form.

inclusion criteria: * hospitalized patients aged ≥18 years. * confirmed diagnosis of covid-19 by rt-pcr or antigen test in respiratory samples. * time between symptom onset and inclusion ≤ 7 days. * enrolled within 5 days of hospitalization. * sign the consent form.

inclusion criteria: - hospitalized patients aged ≥18 years. - confirmed diagnosis of covid-19 by rt-pcr or antigen test in respiratory samples. - time between symptom onset and inclusion ≤ 7 days. - enrolled within 5 days of hospitalization. - sign the consent form.

inclusion criteria: - hospitalized patients aged ≥18 years. - confirmed diagnosis of covid-19 by rt-pcr or antigen test in respiratory samples. - time between symptom onset and inclusion ≤ 7 days. - enrolled within 5 days of hospitalization. - sign the consent form.