In this episode, we break down pneumonia, a common yet potentially life-threatening inflammation of lung tissue most often caused by microorganisms. We’ll explore its major classifications—including Community-Acquired (CAP), Hospital-Acquired (HAP), and Ventilator-Associated Pneumonia (VAP)—and review how risk factors and etiologies differ across categories, from bacteria like Streptococcus pneumoniae to viruses such as SARS-CoV-2. Key clinical manifestations such as fever, chest pain, and purulent sputum will be highlighted, along with essential diagnostic methods like chest imaging and blood cultures. Finally, we’ll discuss management strategies, including targeted antibiotics, supportive measures, and vaccinations, as well as nursing priorities in prevention and patient care.