Two things - soap and water can reduce the chance of infection by 30 per cent. All you need to do is keep washing your hand with soap and water frequently. Wash hands frequently with soap and water or use alcohol-based hand cleaner when soap and water are not available. Avoid touching your eyes, nose and mouth
Eat healthy: Proteins are essential to help your body maintain and build strength. Lean meat, poultry, fish, legumes, dairy, eggs, and nuts and seeds are good sources of protein.
The Food and Drug Administration recommends that adults eat 50 grams of protein per day. Pregnant and nursing women need more. By eating foods high in protein, we also get the benefit of other healing nutrients such as vitamins B6 and B12, both of which contribute to a healthy immune system.
Vitamin B6 is widely available in foods, including protein foods such as turkey and beans as well as potatoes, spinach, and enriched cereal grains. Proteins such as meats, milk, and fish also contain vitamin B12, a powerful immune booster.
Minerals such as selenium and zinc work to keep the immune system strong. These minerals are found in protein rich foods such as beans, nuts, meat, and poultry.
Exercise: Regular exercise may help prevent the flu. According to recent findings, when moderate exercise is repeated on a near daily basis, there is a cumulative immune-enhancing effect. That is, your strong immune system can fight flu better. When you exercise, your white blood cells -- the blood cells that fight infections in the body -- travel through your body more quickly, fighting bacteria and viruses (such as flu) more efficiently. To maintain good health, experts recommend at least 30 minutes of aerobic activity such as walking, swimming, biking, or running each day.