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Healthcare systems often face challenges such as high patient load, limited medical professionals, and lack of access to reliable health information. This paper presents an AI-Driven Public Health Chatbot designed to provide instant healthcare assistance and improve public health awareness. The system uses Natural Language Processing (NLP) and Machine Learning techniques to understand user queries and generate relevant responses. The chatbot provides guidance on symptoms, preventive measures, hygiene practices, and general health information. It also supports features like BMI calculation, health tracking, and medicine suggestions. The system ensures 24/7 availability and reduces dependency on healthcare professionals for basic queries. The proposed solution is scalable, cost-effective, and suitable for modern digital healthcare systems.