Prevention is built on risk reduction and immunization. Influenza vaccination and, for eligible groups, pneumococcal vaccines can lower pneumonia risk and reduce the chance of severe disease. Hand hygiene, minimizing close contact with sick individuals, masking during outbreaks, and ventilating indoor spaces reduce transmission. Smoking weakens airway defenses; quitting is a high-impact preventive action. Controlling chronic conditions (diabetes, COPD), maintaining good nutrition, and prioritizing sleep support immune performance. For those with aspiration risk, swallowing assessment and tailored nutrition strategies are important. Prevention is not one action—it is a sustainable risk-management system executed consistently.