FYI, pneumonia is not a really a single infectious disease, it is a condition caused by a wide variety of infections (bacterial, viral and fungal) and non-infec

FYI, pneumonia is not a really a single infectious disease, it is a condition caused by a wide variety of infections (bacterial, viral and fungal) and non-infectious causes. The bacteria that most commonly causes pneumonia is generally benign in healthy individuals, it only causes pneumonia in a limited set of cases with predisposing factors.