Maintain Good Nutrition

One of the most important ways to protect and strengthen your immune system is to eat a balanced, nutritious diet. Our immune system relies on the right mix of vitamins and minerals to protect our blood cells from infection and to aid our bodies when recovering from illness.Vitamin C increases antibodies in the blood, so aim to increase your intake of fruit such as oranges, grapefruit, lemons and strawberries. Certain vegetables are also high in vitamin C, include brussels sprouts, red and green peppers, broccoli, and cauliflower.
Vitamin D is another important nutrient that research suggests can help the body fight infections. Foods that are a good sources of vitamin D include fatty fish like salmon and sardines; eggs, fortified milk; cheese, fortified juice, tofu and mushrooms.
Stay Hydrated
Dehydration can stress the body and lower immunity. Most people should aim to drink 8, 8-ounce glasses of water a day. Eating fruit, vegetables and soup are another good way to stay hydrated.Maintain Physical Activity
Maintaining regular physical activity is a one of the best way to strengthen your immune system and manage stress. Those who engage in regular exercise have a lower incidence of infection compared to inactive individuals.If you're just starting an exercise program it's important to begin slowly and to take a day off occasionally to give your body enough time to recover.