# 9.A new marker in 80 percent of patients with COVID-19.

Scientists in Spain have found that more than 80 percent of COVID-19 patients are deficient in vitamin D. Many people, especially the elderly, are deficient in vitamin D nowadays. The important role of vitamin D, helping to ensure the body’s ability to fight against coronavirus, during the COVID-19 pandemic. One primary risk prevention for COVID-19 is to identify and treat vitamin D deficiency, especially in the elderly, patients with an underlying medical condition, and residents of nursing homes.
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