1. Immune System2. Parts of Immune System3. Common disorder of Immune System Allergic diseases Autoimmune diseases4. Antioxidants Definition Source of antioxidants Functions of antioxidants5. Some strategies for Keeping Healthy Living6. Plants used as Immune System Booster: Garlic, Tulsi, Papya, Green Tea, Carrots, Spinach, Ginseng, Shilajeet, Guduchi, Capsicum, Turmeric, Ginger, Amla, Black pepper, Lemon, Orange, Oregano, Watermelon, Apple, Strawberry, Blackberry, Blueberry, Liquirice and Sunflower seeds