During waves of influenza, maintaining a strong and healthy immune system is really the only significant protection you can have, unless of course you can completely rule out all possibilities of virus exposure, which is virtually impossible.
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Here are some simple tips and tricks to help you boost your immune system and generally strengthen your body from the comfort of your home.

Vitamin C is known to be a powerful immunity booster that helps keep disease at bay. In fact, much of the strength of the immune system, possibly most of it, comes from the levels of vitamin C in the immune cells.
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When the levels of vitamin C in your body are low, your immune system may not be reaching its full potential. Therefore, regularly supplementing foods rich in vitamin C is one of the most important preventive measures you can take.
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Try to eat more fruits and vegetables. Some of the best foods rich in vitamin C are broccoli, grapefruit, kiwi, oranges, peppers, potatoes, strawberries, sprouts, and tomatoes.

Fatigue is often a symptom of illness. On the other hand, good sleep, rest and relaxation are required for well-being, better health and a strong immune system.
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Studies have shown that lack of sleep increases levels of a hormone called cortisol, which in turn weakens the body's immune system and makes it less able to fight disease.
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Getting the right amount of sleep is a great way to boost your immune system, keep yourself as physically healthy as possible, and give your body the best chance at fighting germs.

Exercising regularly (at least 15 minutes a day) can strengthen your body immensely. In general, moderate exercise seems to temporarily boost immune function, but the key to all of this is BALANCE: While too little weakens the immune system, too much can be a powerful immune suppressor.
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According to Dr. Michael Colgan of the Colgan Institute of Nutritional Science "trained athletes in good health have a higher number of natural killer cells, and a higher level of killer cell activity than sedentary folk. They also have a higher base level of monocytes. Both animal and human studies show that training programs, carefully designed to provide sufficient stress to challenge the immune system but not enough to overwhelm it, result in stronger immunity."

To set wood on fire you need air, because without air there can be no fire. Imagine all of the trillion cells in your body that are like factory workers doing their jobs and consider them part of a great industry that aims to keep you strong and healthy.
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Inhaling fresh air provides your immune system with the right fuel for these cells to function efficiently. Supporting your immune system with these natural therapeutics, rather than suppressing it with drugs, will definitely pay off later.
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Another option is a cool bath (no hot water, no cold water). There are many scientific studies that link the benefits of a cool bath with preventing and reducing the incidence of the disease by 29%.

Gargling with warm salt water is by far one of the safest and easiest home remedies to clean and disinfect the airways. It can also help clear irritants from your lungs and loosen mucus, which can reduce the risk of getting sick.
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In addition, salt soothes inflammation by removing excess moisture from the swollen tissues. Its antiseptic and antimicrobial properties also help clear up microbial infections by limiting bacterial growth.
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However, if you don't feel like mixing or gargling salt-water solutions and still want to clean and clear the mucus from your lungs, there are super-effective devices like AirPhysio that do the job for you. All you have to do is blow in. That's all.