If your 80-day-old baby has a cold and cough that is not serious, you can give him or her warm water, massage his or her back, raise his or her head when he or she coughs, and change his or her position to help relieve the symptoms. If your baby’s cold and cough is more serious and is caused by a viral infection, you can give your baby antiviral medications to treat it, and you can also take medications to clear heat, resolve phlegm and stop coughing, such as pediatric pulmonary cough granules and snake bile and Chen Pi liquid, but you must do it under the guidance of a doctor. During the treatment period, you should keep your baby warm, add clothes according to the weather, and keep the air circulation in your baby’s room with appropriate temperature and humidity.