With the Delta coronavirus variant on the march and the common cold making headway due to some going maskless, there is no better time than today to start taking care of your immune system. The way to do that is to eat immune-boosting foods. Yes, instead of asking your immune cells to take care of you, you can help strengthen your immune system's ability to respond–through healthy lifestyle choices and diet–by arming them with nutrients such as vitamins and minerals, antioxidants and phytochemicals that give your immune "killer" cells the ammo they need to complete their mission: To keep the body safe from invaders and disease.