Ayurveda defines immunity as vyadhi-kshmatva, which means "self-avoidance of disease". To increase immunity, ayurveda has thousands of herbs like Garlic, Echinacea, ginseng, ginger, turmeric, amla etc. In Ayurveda, the immunity system is seen as a guardian that protects you from external threats. You can get all required vitamins from a well-balanced ayurveda diet.