Immune system discoveries reveal how body balances defense, protection and repair

In the past, immune cells were all simply known as white blood cells. Nowadays, we know that there are T cells, B lymphocytes, macrophages, autoreactive T helper cells, microglia, Tregs and others. Together, they form a team that patrols the body like a health police force. Their targets include viruses, harmful bacteria, fungi, parasites, cancer cells and toxins.

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