Selenium
Selenium is well known due to the functions of selenoproteins as an antioxidant defense for cell signaling as (CAT, SOD, GSH, ROS) and redox homeostasis[29]. Glutathione peroxidase is famous for reducing lipid peroxides and hydrogen, thioredoxin reductase for the thiol systems homeostasis. ROS are generated against (HIV) for the immunity system, (RSV) for the respiratory system and flu viruses 30]. Selenium low intake level can weaken the immune system, on the other hand rapid RNA mutations from benign variants to virulence. Ginseng bioactive component extract had used successfully for bronchitis coronavirus. As a result selenium supplementation can be used for COVID‐19 treatment[31].