https://timesofindia.indiatimes.com/education/learning-with-toi/how-our-immune-system-fights-disease-explained/articleshow/100620910.cms
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6/16/23 at 12:30am
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The Times of India
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TOI Education
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Learning with TOI News: The immune system protects our body from harmful invaders like bacteria, viruses, and pathogens. It recognizes foreign substances named antigens that
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