immune system block?

What is pneumonia? Learn basic facts about pneumonia here, plus how doctors define the different types of pneumonia that people can get....

Some people are more at risk of getting pneumonia than others. Are you one of them? Learn more about how you get pneumonia and who is at risk here....

Chest pain is typical during cases of pneumonia. But what other signs and symptoms should you look for? Know when to seek medical help by starting here....