If you are the sort of person that easily catches the sniffles, coughs, and colds, here are some easy and effective ways to boost your immune system.
1. Stop smoking to help boost your immune system
Everyone knows smoking is bad for you. It increases your risks of getting lung cancer and other severe lung diseases. The damage that the smoke does to lung cells can cause COPD (Chronic Obstructive Pulmonary Disorder), emphysema, and swelling. Heart disease, stroke, and premature aging are also connected to smoking, but its also associated with a poor immune system.[1]
What it does: Smoking makes you more susceptible to infections because it destroys vitamin C and other important antioxidants that kill mutated cells and fight infections. It also destroys antibodies, which are compounds that fight infection.

Image Source: A Vogel