Innate Immunity Explained | Human Health & Disease | NCERT Class 12 Biology | NEET 2026

Innate Immunity is one of the most important topics from the chapter "Human Health and Disease" in Class 12 Biology (NCERT). This concept is frequently asked in NEET and board examinations. In this complete video, you will learn: 1️⃣ A short story hook to understand how our body fights infections 2️⃣ Detailed NCERT-based explanation of Innate Immunity 3️⃣ Types of innate immunity barriers (physical, physiological, cellular, cytokine barriers) 4️⃣ Importance of this topic for NEET and board exams (marks weightage + probability) 5️⃣ Most important objective and subjective questions with solutions Topics Covered: • What is immunity • Innate vs acquired immunity • Types of innate immunity barriers • Role of macrophages and natural killer cells • Interferons and immune response This topic is frequently asked in: ✔ NEET MCQs ✔ Assertion–Reason questions ✔ Case-based questions ✔ Board exams If you want strong conceptual clarity in Biology and better scores in NEET or Class 12 exams, this video will help you a lot. Subscribe to BioBoost with SG for exam-focused Biology preparation. #InnateImmunity #HumanHealthAndDisease #NEETBiology #Class12Biology #BioBoostWithSG