Pneumonia

Homepage for CDC's information on pneumonia, an infection of the lungs.

CDC Health Topics A–Z 1 min read
This content is for informational purposes only. Always consult a healthcare professional.

Source: Centers for Disease Control and Prevention — Content from the Centers for Disease Control and Prevention (public domain).

x-ray of the lungs with pneumonia About Many different bacteria, fungi, and viruses can cause pneumonia (a lung infection). Learn More Feb. 25, 2026 Two older woman laugh with young child Risk Factors Certain ages, medical conditions, and behaviors can increase your risk for pneumonia. Feb. 25, 2026 A healthcare worker listens to a patient’s lungs. Prevention Lower your risk of pneumonia with vaccines and other healthy living practices. Feb. 25, 2026 For Professionals A healthcare professional draws a checkmark Management and Prevention Guidelines Many professional organizations have issued guidelines to manage and prevent pneumonia. Learn More Feb. 25, 2026

⚠ Caution
Medical Disclaimer: This information is for educational purposes only. Always consult a healthcare professional for medical advice.