Babies who are just seven days old can be observed if they have an occasional cough, which is not much more than once or twice a day. This is because small babies sometimes choke on their own saliva or because they have a very sensitive cough reflex. Because the air outside is not very clean, it may also stimulate a cough. If your baby coughs a lot, coughing 3 to 5 times a day, coughing with a deep sound, or observing your baby quietly with shortness of breath and blue around the mouth. Then you need to be alert to the occurrence of pneumonia in your baby, because the resistance of a seven-day-old baby is relatively poor, and once if a respiratory infection occurs, it may soon progress to pneumonia. So if a seven-day-old baby coughs a lot you should go to the hospital and let the doctor perform an auscultation, as well as the necessary tests.