The common term for the infection that causes pneumonia is pneumonitis, generally referred to as pneumonia. This respiratory condition involves inflammation of the lungs, resulting from infections caused by bacteria, viruses, or fungi. Symptoms can include cough, fever, and difficulty breathing. Pneumonia is a serious condition that can lead to complications, especially in vulnerable populations such as the elderly or immunocompromised individuals. Treatment typically involves antibiotics for bacterial pneumonia and supportive care for viral cases.