Respiratory situation at 24 hours, 3 and 7 days based on PaO2 / FiO2 ratio that graduates respiratory distress from mild (200-300), moderate (100-200) and severe (<100). In addition, it will include: presence of dyspnea and grade according to the New York Health Association (NYHA) scale, presence of respiratory work and respiratory rate (FR). ii. PCR value, LDH, D-dimer, ferritin, IL-6 and total lymphocytes at 24 hours, 3 and 7 days. Each one is a quantitative variable. They will be measured as such and also qualitatively (worse, better) independently and together. A worsening of 3 of the 5 variables will be considered “worse”, “Better” if there is improvement in 3 out of 5. iii. Mechanical ventilation: qualitative variable (yes or no) iv. Combined variable of variables i and / or iii and / or in-hospital mortality - Situación respiratoria a las 24 horas, 3 y 7 días en base a cociente PaO2/FiO2 que gradúa el distrés respiratorio en leve (200-300), moderado (100-200) y grave (<100). - Situación de hiperactivación inmunológica: valor de la LDH, dímero D y ferritina a las 24 horas, 3 y 7 días. - Ventilación mecánica. - Variable combinada de las variables i, iii y mortalidad intrahospitalaria

Respiratory situation at 24 hours, 3 and 7 days based on PaO2 / FiO2 ratio that graduates respiratory distress from mild (200-300), moderate (100-200) and severe (<100). In addition, it will include: presence of dyspnea and grade according to the New York Health Association (NYHA) scale, presence of respiratory work and respiratory rate (FR). ii. PCR value, LDH, D-dimer, ferritin, IL-6 and total lymphocytes at 24 hours, 3 and 7 days. Each one is a quantitative variable. They will be measured as such and also qualitatively (worse, better) independently and together. A worsening of 3 of the 5 variables will be considered “worse”, “Better” if there is improvement in 3 out of 5. iii. Mechanical ventilation: qualitative variable (yes or no) iv. Combined variable of variables i and / or iii and / or in-hospital mortality - Situación respiratoria a las 24 horas, 3 y 7 días en base a cociente PaO2/FiO2 que gradúa el distrés respiratorio en leve (200-300), moderado (100-200) y grave (<100). - Situación de hiperactivación inmunológica: valor de la LDH, dímero D y ferritina a las 24 horas, 3 y 7 días. - Ventilación mecánica. - Variable combinada de las variables i, iii y mortalidad intrahospitalaria