If the cough is caused by pharyngitis, of course, it is not contagious. If the cough is caused by mycoplasma pneumonia, it may be contagious if the treatment is delayed due to failure or mismanagement. In addition, if the cough is caused by tuberculosis, and if the cough is in the active stage of tuberculosis, it is certainly often contagious to the baby, so it is important to find the cause of the cough.