A vigorous immune system is vital to good health, both physical and mental. Chronic fatigue, endless colds, and symptoms of allergy are just some all too common manifestations of a weakened immune system, while there is increasing awareness of outright autoimmune disorders such as rheumatoid arthritis, lupus and Sjogren's syndrome. The good news is that there are many ways in which we can strengthen our immune systems. This book looks at: how your immune system works and what can hamper it, such as poor diet, lack of sleep or exercise, stress, or depression; warning signs of a weakened immune system; treatments; building and maintaining a strong immune system - the self-defence plan; nutrition; your attitude and outlook; exercise and skin-brushing; getting enough sleep; and alternative treatments - herbs and vitamin supplements.