Previous Year Papers NEET Biology Class 12 – Human Health and Disease

Human Health and Disease is a crucial chapter of NEET Biology Class 12 that explains infectious and non-infectious diseases, immunity mechanisms, vaccines, and preventive measures. Mastery of this chapter is essential for answering both theoretical and diagram-based NEET questions.

NEET previous year papers frequently include questions on pathogens, immunity, immunological disorders, and public health measures. Practicing PYQs helps students strengthen understanding of human health and disease. Studentbro.in provides exam-focused material for effective preparation.

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Infectious Diseases – NEET PYQ Focus

Infectious diseases are caused by pathogens such as bacteria, viruses, fungi, and protozoa. Major examples:

• Bacterial – Tuberculosis (Mycobacterium tuberculosis), Typhoid (Salmonella typhi).

• Viral – Influenza, HIV/AIDS, Hepatitis.

• Protozoan – Malaria (Plasmodium spp.).

• Fungal – Ringworm (Trichophyton).

NEET questions often test causative organisms, modes of transmission, symptoms, and treatment.

Non-Infectious Diseases – Important NEET Concepts

• Genetic Disorders – Sickle cell anemia, Down syndrome, Thalassemia.

• Metabolic Disorders – Diabetes, Gout.

• Deficiency Diseases – Scurvy, Rickets, Pellagra.

Previous year papers may ask causes, symptoms, and preventive measures for these disorders.

Immunity – Key Concepts

Immunity is the body’s defense mechanism against pathogens:

• Innate Immunity – Non-specific defense; includes barriers, phagocytosis, inflammation.

• Acquired Immunity – Specific defense; includes humoral (antibody-mediated) and cell-mediated immunity.

• Active Immunity – Acquired via infection or vaccination.

• Passive Immunity – Acquired via maternal antibodies or antibody injections.

NEET PYQs often test types of immunity, differences, and examples.

Vaccines – NEET PYQ Focus

Vaccines stimulate active immunity by introducing antigens. Types:

• Live Attenuated Vaccines – Measles, Mumps, Rubella.

• Killed/Inactivated Vaccines – Polio (IPV), Cholera.

• Toxoid Vaccines – Tetanus, Diphtheria.

• Subunit/Conjugate Vaccines – Hepatitis B, Pneumococcal.

Previous year papers may ask types, examples, and mechanisms of vaccination.

Immunological Disorders

• Autoimmune Diseases – Body attacks own cells (e.g., Lupus, Rheumatoid Arthritis).

• Immunodeficiency Disorders – Reduced immunity (e.g., SCID, AIDS).

• Hypersensitivity – Allergies, asthma.

NEET questions often test causes, examples, and symptoms.

Cancer and Tumors

• Benign Tumors – Localized growth; non-cancerous.

• Malignant Tumors – Cancerous; metastasize.

• Causes – Genetic mutation, carcinogens, radiation, viruses.

Previous year papers may include differences between benign and malignant tumors, and examples.

Prevention of Diseases

• Sanitation and Hygiene – Clean water, personal hygiene.

• Vector Control – Preventing mosquito-borne diseases.

• Vaccination – Immunization against infectious diseases.

• Balanced Diet and Exercise – Maintaining good health.

NEET PYQs often include preventive strategies for common diseases.

Importance of Previous Year Papers for NEET Biology

Practicing previous year papers helps students identify frequently asked topics, reinforce conceptual understanding, and improve speed. PYQs for Human Health and Disease focus on pathogens, immunity, vaccines, immunological disorders, and preventive strategies.

Conclusion

Previous Year Papers of NEET Biology Class 12 Human Health and Disease are essential for mastering concepts of infectious and non-infectious diseases, immunity, and preventive measures. This chapter requires clear understanding of pathogens, immunity types, vaccination, and disease prevention.

Regular practice of PYQs helps students enhance conceptual clarity, problem-solving skills, and confidence in NEET. Studentbro.in provides structured, reliable, and exam-focused content to help NEET aspirants succeed.