@onamission Staying healthy and doing things to keep your immune system strong is a good idea. This article from Harvard Health offers some evidence-based advice.

- Helpful ways to strengthen your immune system and fight off disease https://www.health.harvard.edu/staying-healthy/how-to-boost-your-immune-system
On selenium it states "There is some evidence that various micronutrient deficiencies — for example, deficiencies of zinc, selenium, iron, copper, folic acid, and vitamins A, B6, C, and E — alter immune responses in animals, as measured in the test tube. However, the impact of these immune system changes on the health of animals is less clear, and the effect of similar deficiencies on the human immune response has yet to be assessed." Research is ongoing and looks promising. However, selenium deficiency has not been tested with COVID-19 yet.

Staying healthy is important. Social distancing and washing your hands are key to helping the community spread.