A multi-center, randomized, open-label study assessed the effectiveness of vitamin D and the Zelenko protocol (hydroxychloroquine, zinc, and azithromycin). Seven hospitals in Turkey applied the treatment protocol with and without vitamin C to study its effectiveness for shortening the duration of illness and prevention of death.
Out of the 237 hospitalized patients, (ages 22-99), one passed away at the age of 70. The patient had severe vitamin D deficiency and underlying heart and lung disease. The remaining 99.58% of patients recovered with broad spectrum, natural immunity. During the study, the researchers found that 97% of all the hospitalized patients were vitamin D deficient. Patients who were severely vitamin D deficient (55%) were more likely to end up in the ICU and be hospitalized longer. A majority (73%) of hospitalized patients also suffered from underlying comorbidities such as diabetes, heart and lung disease.