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* 15 Foods That Boost the Immune System - Heathline +
* 1. Citrus fruits
Popular citrus fruits include:
* 2. Red bell peppers
Red peppers also contain:
* Soda
* Foods and drinks high in sugar * Refined carbohydrate
* Also, infections like the flu virus, mono (mononucleosis), and measles can weaken the immune system for a brief time. Your immune system can also be weakened by smoking, alcohol, and poor nutrition.
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