- Male or female patients - Aged over 18 years - Having mild or moderate illness according to the National Institute of Health Classification system for SARS CoV -2 o Mild illness: Individuals who have any of the various signs and symptoms of COVID-19 (e.g., fever, cough, sore throat, malaise, headache, muscle pain, nausea, vomiting, diarrhea, loss of taste and smell) but who do not have shortness of breath, dyspnea, or abnormal chest imaging. o Moderate illness: Individuals who show evidence of lower respiratory disease during clinical assessment or imaging and who have an oxygen saturation (SpO2) greater than or equal to 94% on room air at sea level. - Laboratory confirmed SARS-CoV-2 symptomatic infection - Availability of the patient for recruitment into the study within 96 hours of symptom onset - Normal corrected/ ionized calcium at the time of admission according to the reference range provided by the laboratory

- Male or female patients - Aged over 18 years - Having mild or moderate illness according to the National Institute of Health Classification system for SARS CoV -2 o Mild illness: Individuals who have any of the various signs and symptoms of COVID-19 (e.g., fever, cough, sore throat, malaise, headache, muscle pain, nausea, vomiting, diarrhea, loss of taste and smell) but who do not have shortness of breath, dyspnea, or abnormal chest imaging. o Moderate illness: Individuals who show evidence of lower respiratory disease during clinical assessment or imaging and who have an oxygen saturation (SpO2) greater than or equal to 94% on room air at sea level. - Laboratory confirmed SARS-CoV-2 symptomatic infection - Availability of the patient for recruitment into the study within 96 hours of symptom onset - Normal corrected/ ionized calcium at the time of admission according to the reference range provided by the laboratory