Class 12 · Human Health and Diseases

Immunity: Body's Defense Against Pathogens — NEET Biology

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Everyday we are exposed to large number of infectious agents. However, only a few of these exposures result in disease. Why? This is due to the fact that the body is able to defend itself from most of these foreign agents. This overall ability of the host to fight the disease-causing organisms, conferred by the immune system is called immunity.

NCERT Biology · Class 12 · Chapter 7 · Paragraph 26
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What is immunity?

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Correct answer: C Body’s ability to fight disease-causing organisms

Immunity is defined as the host's ability to resist disease, conferred by the immune system.

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What does NCERT say about Everyday we are exposed?
Everyday we are exposed to large number of infectious agents. However, only a few of these exposures result in disease.
Has this concept appeared in NEET?
Practice this NCERT concept with questions on MedicNEET.
Which chapter is this from?
Human Health and Diseases, Class 12 NCERT Biology.

Through deep analysis of NEET and NTA, 176 of the 180 ReNEET 2026 (June 21) questions were already in the MedicNEET question bank before the exam.

176/180
of the ReNEET 2026 paper (all subjects) was already in the MedicNEET question bank

MedicNEET's Biology question bank is built from the same NCERT lines NTA picks repeatedly. Not random MCQs — questions crafted exactly like NTA crafts them.

176 of 180 ReNEET 2026 questions traced to MedicNEET17,000+ Biology questionsHindi + English
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