inclusion criteria: 1. age equal to or older than 18 years 2. both genders 3. for women of childbearing potential, they must use or be willing to use a dual contraceptive method during the study. 4. written consent statement provided by the patient or his / her legal representative in case patients are unable to consent. 5. confirmed covid-19 disease 6. who-cps 7 to 9 7. hospitalization in intensive care unit 8. serum h2s levels less than 140 μm

inclusion criteria: 1. age equal to or older than 18 years 2. both genders 3. for women of childbearing potential, they must use or be willing to use a dual contraceptive method during the study. 4. written consent statement provided by the patient or his / her legal representative in case patients are unable to consent. 5. confirmed covid-19 disease 6. who-cps 7 to 9 7. hospitalization in intensive care unit 8. serum h2s levels less than 140 μm

inclusion criteria: age equal to or older than 18 years both genders for women of childbearing potential, they must use or be willing to use a dual contraceptive method during the study. written consent statement provided by the patient or his / her legal representative in case patients are unable to consent. confirmed covid-19 disease who-cps 7 to 9 hospitalization in intensive care unit serum h2s levels less than 140 μm

inclusion criteria: age equal to or older than 18 years both genders for women of childbearing potential, they must use or be willing to use a dual contraceptive method during the study. written consent statement provided by the patient or his / her legal representative in case patients are unable to consent. confirmed covid-19 disease who-cps 7 to 9 hospitalization in intensive care unit serum h2s levels less than 140 μm