Based on my 42 years of owning a Health Food Store and of course lots of research, these are the 9 most important nutrients that are needed by your immune system to combat Covid or any other virus:..ZINC is the #1 mineral for the immune system. It's needed by the Thyroid and works with B-6... MAGNESIUM is the #1 mineral for the whole body and it also works with /needs B-6... B-6 known as Pyridoxine HCL and the more bioactive form Pyridoxal-5-Phosphate is depended on by 23 nutrients. 21 of them are Amino Acids. B-6 is an important catalyst and the #1 most important B vitamin...SELENIUM is a very important antioxidant mineral that has anti-virial and anti-cancer properties in particular Prostate cancer. It is an essential mineral for the Thyroid... Also IODINE is very important to the Thyroid, Ovarian tissue, Prostate, and Breast tissue. Also has anti-virial, anti-bacterial and anti-cancer actions...Vit-C helping to protect cells and keeping them healthy, maintaining healthy skin, blood vessels, bones and cartilage and helping with wound healing... Vit-D besides it's well known for keeping bones, teeth and muscles healthy, it's also important for the heart and essential for the immune system maintenance. Darker skin People have the lowest levels of Vit-D and that makes them more prone to Cancer...N-ACETYL-L-CYSTEINE (NAC) is a powerful protective and detoxifying antioxidant Amino Acid that is used by the immune system to protect the Liver, LUNGS and Sinus. Being an Amino Acid it works with B-6...QUERCITIN is one of the most powerful antioxidant Bioflavonoid, the cousin to Vit-C, that calms down inflammation, helpful with allergies and HELPS DRIVE ZINC INTO CELLS.