Lung cancer and its treatments can weaken the immune system, increasing the risk of developing pneumonia. While some symptoms of lung cancer and pneumonia overlap, pneumonia symptoms typically appear ...

Pneumonia is a lung infection that can range from mild to so serious that you have to go to the hospital. It happens when an infection causes air sacs in your lungs (the alveoli) and tubes in your ...

While pneumonia, an infection in the lungs, itself isn’t contagious, the viruses and bacteria that cause it often are. People with weakened immune systems may be at a greater risk from contagious ...

Pneumonia is an inflammation of one or both lungs, typically due to a bacterial, viral, or fungal infection. With pneumonia, the tiny air sacs inside the lungs fill with fluid or pus, leading to ...