Depends on the patient and the severity. In normally healthy younger people with mild to moderated cases it can usually be managed outpatient with oral antibiotics. In the very young (infants) and the very old, often due the weakness caused by the infection and the susceptibillity of their bodies to complications they will be treated as inpatients with IV antibiotics and supplemental oxygen. More severe cases in any age patient will require inpatient hospitalization, supplemental oxygen, Iv antibiotics with the potential for full ventilator support. ~MRKM RN LNC