The article was written by Sandee LaMotte — a medical producer and writer for CNN and executive producer of video at pharma-biased WebMD. Three other CNN reporters, Emma Reynolds, Shelby Lin Erdman and Rob Picheta, also contributed to the story.

The article quotes Robin May, director of the British Institute of Microbiology and Infection as saying:2 "To date, there is no evidence that very high vitamin D levels are protective against COVID-19 and consequently medical guidance is that people should not be supplementing their vitamin D levels beyond those which are currently recommended by published medical advice."