There are some home remedies that can quickly and easily become immune system boosters. These remedies include ginger, turmeric, chili and fennel. For example, you can make yourself a tea by adding a few pieces of ginger or a spoonful or two of turmeric powder to hot water. Many Ayurvedic retreats will teach you natural remedies as well as herbs and spices that will help you keep your immune system working well, even during daily life.