Another reason for the severe course of coronavirus identified

"Vitamin D deficiency is the dominant risk factor for severe coronavirus disease," said Dr. Garrett Davis.

He noted that a full year cycle is required for a full study, and the coronavirus epidemic began less than a year ago.

The expert also added that vitamin D can protect the body from the penetration of coronavirus.

Earlier, Moscow Mayor Sergei Sobyanin said that 95% of deceased patients with coronavirus in the capital were self-medicating.