How to Strengthen Your Immune System

White blood cells, also known as leukocytes, are the body's natural defense against infections, and are a major part of the function of the immune system.
They eat away foreign bacteria and other organisms that invade the body, and they are therefore responsible for immunity (the ability of the body to fight infections).

Some people may have weaker immune systems genetically; others may have weaker immune systems because of viral or bacterial infections.

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