Age

18–any

Sex

ALL

Healthy volunteers

Not accepted

SARS-CoV-2 confirmed infection;
Admission to a hospital;
Expected hospitalization in the center for at least for 24 hs;
Oxygen Saturation \>90% breathing without oxygen supplement;
Age at least 45 years or the presence of one of the followings risk factors:
Hypertension;
Diabetes (type I o II);
At least moderate COPD or Asthma;
Cardiovascular disease (history of myocardial infarction, coronary angioplasty, coronary artery bypass grafting or valve replacement surgery);
Body Mass Index \>=30;
Signed Written consent.

\<18 years old;
Women in childbearing age;
\>= 72 hs since current admission;
Requirement for high dose of oxygen (\>5 liters/minute) or mechanical ventilation (non-invasive or invasive);
History of Chronic kidney disease requiring hemodialysis or chronic liver failure;
Inability for oral intake;
Previous treatment with pharmacological vitamin D;
History of:
previous treatment with anticonvulsants;
sarcoidosis;
malabsorption syndrome;
Known hypercalcemia.
Life expectancy less than 6 months;
Known allergy to the study medication;
Any condition impeding to bring informed consent.

Cholecalciferol to Improve the Outcomes of COVID-19 Patients