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Why does cancer treatment weaken a person's immune system?

The immune system is weakened during all types of cancer treatment. Unfortunately, chemotherapy medications do not differentiate between healthy cells and cancer cells. For this reason, perfectly healthy red and white blood cells are damaged or killed during treatment and shortly thereafter. The result of this is that the body is not as good at fighting illness and infection.

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What Are the Most Important Advances in Cancer Treatment?
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Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.