Vitamin D Deficiency Increases Spread of DiseasePeople with higher levels of vitamin D are less likely to die from COVID-19, and researchers even found that increasing levels to 50 ng/mL could lead to a mortality rate close to zero.Dr. Joseph MercolaDec 15, 2021∙ Paid8ShareContinue reading this post for free, courtesy of Dr. Joseph Mercola.Claim my free postOr purchase a paid subscription.