The immune system is designed to work against diseases in your body. It has a resistive power that fights bad bacteria and viruses that can cause illness and sickness. The immune system is designed perfectly, but our negligence towards our health often weakens the system. If it is not properly cared for, it becomes so weak that even small illnesses like the flu or a cough can become severe. The immune system also becomes dirty by fighting too much bacteria. Cleaning is required to make it strong again. There are many ways to clean the immune system and boost its power. Here are some of the ways to do it naturally.