Which is the distinction between pneumonia and walking pneumonia?

Clinical appearance: Bacterial pneumonia could be life threatening especially in elderly population, but majority of the time, infection is below the vocal cord and in the interstitiium, causing fever and cough and crackles in examination but not severe enough to be treated by IV antibiotics, therefore, could be treated with PO medications and patients could take it as out patient, hence walking. Shahzeidi, md.