1. Willingness of the patient by signing the informed consent.2. Subject of any sex and age greater than or equal to 18 years.3. Subjects for whom at least 14 days have elapsed from discharge from the post-COVID-19 patient care service or referral of the specialized consultation.4. Patients with respiratory clinical manifestations and deterioration of respiratory function due to spirometric or radiological functional pattern. 5. Subject that in the pre-inclusion checkup they have: hemoglobin = 9 g/L, leukocytes = 3.4x109 L, absolute neutrophil count = 1.5 x 109 L.6. Liver and kidney function tests in normal ranges.

1. Willingness of the patient by signing the informed consent.2. Subject of any sex and age greater than or equal to 18 years.3. Subjects for whom at least 14 days have elapsed from discharge from the post-COVID-19 patient care service or referral of the specialized consultation.4. Patients with respiratory clinical manifestations and deterioration of respiratory function due to spirometric or radiological functional pattern. 5. Subject that in the pre-inclusion checkup they have: hemoglobin = 9 g/L, leukocytes = 3.4x109 L, absolute neutrophil count = 1.5 x 109 L.6. Liver and kidney function tests in normal ranges.

1. Willingness of the patient by signing the informed consent.2. Subject of any sex and age greater than or equal to 18 years.3. Subjects for whom at least 14 days have elapsed from discharge from the post-COVID-19 patient care service or referral of the specialized consultation.4. Subject that in the pre-inclusion checkup they have: hemoglobin = 9 g/L, leukocytes = 3.4x109 L, absolute neutrophil count = 1.5 x 109 L.5. Liver and kidney function tests in normal ranges, or out of range without clinical relevance.6. Functional status according to Karnofsky = 40%.

1. Willingness of the patient by signing the informed consent.2. Subject of any sex and age greater than or equal to 18 years.3. Subjects for whom at least 14 days have elapsed from discharge from the post-COVID-19 patient care service or referral of the specialized consultation.4. Subject that in the pre-inclusion checkup they have: hemoglobin = 9 g/L, leukocytes = 3.4x109 L, absolute neutrophil count = 1.5 x 109 L.5. Liver and kidney function tests in normal ranges, or out of range without clinical relevance.6. Functional status according to Karnofsky = 40%.