The immune system is an intricate network of cells, tissues, and organs that work together to defend the body against attacks by "foreign" invaders. Since the human body provides an ideal environment for many different microbes, it is the immune system’s job to keep them out or, if they do get in, to seek out and destroy them. For some immune health is simply immune support - helping the body continue at optimum levels. For those with compromised or over-active immune systems, it's working to regain normal levels.
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