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
[{'content': 'Immunization is \nSelect and explain. \nA. Primary Prevention, B. Secondary prevention, C. Teiary Prevention, D. Disability Limitation', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Primary prevention is action taken prior to the onset of disease which removes the possibility that a disease will ever occur.It includes actions taken for the protection of health by personal and community effos, such as enhancing nutritional status, providing immunizations and eliminating environmental risks (sanitation...etc)Park 23epg: 43', 'role': 'assistant'}]