Regardless of what the mainstream media wants you to think, many are starting to realize that vitamin C (ascorbic acid) and vitamin D both have an enormous amount of research showing they provide important immune function enhancements, and that your immune function is your frontline defense against all illness, including COVID-19.
The following was reported in the paper “Optimal Nutritional Status for a Well-Functioning Immune System Is an Important Factor to Protect Against Viral Infections,” published April 23, 2020: