This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Concept of Health and Disease, Subject name: Social & Preventive Medicine
Immunization is- 
Select and explain. 
A. Primary prevention, B. Secondary prevention, C. Tertiary prevention, D. Disability limitation
A: Primary prevention
Answer: A: Primary prevention 
Explanation: Ans. is 'a' i.e., Primary prevention Level of preventionExampleso Primordial preventiono Discouragement from adapting a harmful lifestyle, e.g. smokingo Primary preventiono Immunization (vaccination)o Chemoprophylaxiso Nutritional supplementation programmeso Chlorination of watero Using a mosquito neto Health educationo Secondary preventiono Screening testo Case finding programmeso Early diagnosis & treatmento Tertiary preventiono Disability limitation* Resting the affected limb in neutral position in PRPP to prevent deformityo Rehabilitation* Estabilishing schools for blind* Provision of aids for crippled* Reconstructive surgery in leprosy* Muscle re-education and graded exercise in neurological disorder like polio* Changing profession for a more suitable one