Professor Michael Holick of Boston University describes a major report that he co-authored about Vitamin D and coronavirus that was published on September 17th, 2020
190,000 people in USA had a Vitamin D blood test in the previous 12 months
AND – then had a test for coronavirus
AND – had their Zipcode available for analysis
See the details of how a high level of Vitamin D reduced their chance of testing positive for coronavirus
See how where they lived affected their chance of testing positive
See how the colour of their skin affected their chance of testing positive
