Quantify the number of days for respiratory recovery; defined as oxygen saturation greater than 93% measured by pulse oximeter; without oxygen supplementation for at least 24 hours. If the patient achieves this goal; but is kept in the hospital for other reasons (for example; non-respiratory organ dysfunction); the goal will be considered fulfilled.;With regard to secondary outcomes; it is expected to measure the number of days without a ventilator until hospital discharge; hospitalization time; presence of recovery or death; which will be verified by telephone; what is the frequency; severity and ratio of adverse effects related to treatment; what is the frequency of adverse events that justify premature discontinuation of treatment or study; what are the changes in clinical and laboratory parameters (biochemical; hematological and urinary) between admission to the study and post-treatment.

Quantify the number of days for respiratory recovery; defined as oxygen saturation greater than 93% measured by pulse oximeter; without oxygen supplementation for at least 24 hours. If the patient achieves this goal; but is kept in the hospital for other reasons (for example; non-respiratory organ dysfunction); the goal will be considered fulfilled.;With regard to secondary outcomes; it is expected to measure the number of days without a ventilator until hospital discharge; hospitalization time; presence of recovery or death; which will be verified by telephone; what is the frequency; severity and ratio of adverse effects related to treatment; what is the frequency of adverse events that justify premature discontinuation of treatment or study; what are the changes in clinical and laboratory parameters (biochemical; hematological and urinary) between admission to the study and post-treatment.