inclusion criteria: - age ≥18 years old. - diagnosis of sars-cov-2 pneumonia confirmed by reverse transcriptase polymerase chain reaction (rt-pcr) on nasopharyngeal swab or sputum according to the recommendations of the spanish ministry of health. - length of symptoms consistent with covid-19 ≥7 days. - hospital admission. - at least one of the following: crp >60 mg/l, il-6 >40 pg/ml, ferritin >1000 μg/l. - acceptation of informed consent

inclusion criteria: - age ≥18 years old. - diagnosis of sars-cov-2 pneumonia confirmed by reverse transcriptase polymerase chain reaction (rt-pcr) on nasopharyngeal swab or sputum according to the recommendations of the spanish ministry of health. - length of symptoms consistent with covid-19 ≥7 days. - hospital admission. - at least one of the following: crp >60 mg/l, il-6 >40 pg/ml, ferritin >1000 μg/l. - acceptation of informed consent