People who exercise regularly get fewer colds and other infections than people who don't
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Exercising regularly increases production of antibodies and T-Cells which help boost the immune system and keep sickness away.
Including Zinc in your diet will boost your immunity
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An absence of zinc from the diet can cause the immunity levels to drop. Eat beans, nuts, whole grains, fortified breakfast cereals, and dairy products for zinc.
Exposure to sunlight can decrease your immunity levels
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Adequate exposure to sunlight leads to the creation of Vitamin D, which is great for boosting the immune system.
Immunity levels remain the same throughout your life
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Your immunity levels decrease as you age. The production of white blood cells that kill the germs and viruses starts to lower when you are in your 30s and continues to decrease as you age.
Lack of proper sleep reduces your body's ability to fight off germs and viruses
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Lack of sleep or experiencing disturbed sleeping patterns decreases your immunity and makes you prone to infections. Consult your doctor if you are having trouble sleeping.