If an infant develops pneumonia and needs oxygen, then its duration is usually about one to two months. If the baby’s condition is not very serious, then oxygen can be administered for about two weeks, depending on the extent of the condition. The long duration of oxygen intake is generally not harmful to the baby’s body and can also help the recovery of pneumonia with a good promotion. If the purple and blue color of the baby’s face disappears, oxygen is no longer necessary, after which you can choose the appropriate treatment according to the degree of the baby’s condition.