1. pregnant or breast-feeding females 2. patients with non-covid19 related pneumonia 3. any pulmonary disease not related to covid19 4. tracheostomy 5. high flow oxygen or non-invasive ventilation (bipap) or mechanical ventilation 6. hypercalcemia defined as calcium or corrected calcium \> 10.5mg/dl 7. hyperphosphatemia defined as \> 4.5mg/dl 8. urine calcium to creatinine ratio \>0.14 9. participating in another clinical study

1. pregnant or breast-feeding females 2. patients with non-covid19 related pneumonia 3. any pulmonary disease not related to covid19 4. tracheostomy 5. high flow oxygen or non-invasive ventilation (bipap) or mechanical ventilation 6. hypercalcemia defined as calcium or corrected calcium \> 10.5mg/dl 7. hyperphosphatemia defined as \> 4.5mg/dl 8. urine calcium to creatinine ratio \>0.14 9. participating in another clinical study

pregnant or breast-feeding females patients with non-covid19 related pneumonia any pulmonary disease not related to covid19 tracheostomy high flow oxygen or non-invasive ventilation (bipap) or mechanical ventilation hypercalcemia defined as calcium or corrected calcium > 10.5mg/dl hyperphosphatemia defined as > 4.5mg/dl urine calcium to creatinine ratio >0.14 participating in another clinical study

pregnant or breast-feeding females patients with non-covid19 related pneumonia any pulmonary disease not related to covid19 tracheostomy high flow oxygen or non-invasive ventilation (bipap) or mechanical ventilation hypercalcemia defined as calcium or corrected calcium > 10.5mg/dl hyperphosphatemia defined as > 4.5mg/dl urine calcium to creatinine ratio >0.14 participating in another clinical study

1. pregnant or breast-feeding females 2. patients with non-covid19 related pneumonia 3. any pulmonary disease not related to covid19 4. tracheostomy 5. high flow oxygen or non-invasive ventilation (bipap) or mechanical ventilation 6. hypercalcemia defined as calcium or corrected calcium > 10.5mg/dl 7. hyperphosphatemia defined as > 4.5mg/dl 8. urine calcium to creatinine ratio >0.14 9. participating in another clinical study

1. pregnant or breast-feeding females 2. patients with non-covid19 related pneumonia 3. any pulmonary disease not related to covid19 4. tracheostomy 5. high flow oxygen or non-invasive ventilation (bipap) or mechanical ventilation 6. hypercalcemia defined as calcium or corrected calcium > 10.5mg/dl 7. hyperphosphatemia defined as > 4.5mg/dl 8. urine calcium to creatinine ratio >0.14 9. participating in another clinical study