Level 1: Symptoms of cough in two-month-old babies. Since the immunity of two-month-old babies is not fully developed, they are easily infected with respiratory diseases, causing coughing and other discomforts. At this time, the baby\’s breathing is still relatively fragile. Once symptoms such as cough appear, parents need to pay attention in time. Common symptoms of cough in two-month-old babies include: frequent dry cough, low-grade fever, and runny nose