Pneumonia

Pneumonia is a lung infection that causes inflammation in the air sacs (alveoli), which may fill with fluid or pus, leading to coughing, fever, chest pain, and difficulty breathing. It can be caused by bacteria, viruses, or fungi, and severity ranges from mild to life-threatening, especially in young children, the elderly, and those with weakened immune systems. Early diagnosis and proper treatment are essential for recovery and preventing complications.