Baby colds happen to be contagious. Because the younger the child, the lower his immunity, the lower the resistance, and colds are caused by a variety of pathogens, usually bacteria, viruses, mycoplasma or chlamydia and so on. Bacteria are usually Staphylococcus aureus and Streptococcus pneumoniae, and viruses are usually influenza virus, rhinovirus, and adenovirus. So if your child has a cold, it’s a recovery period, the body is adjusting itself, and his immunity and resistance are not yet at their optimal normal levels. At this time, if contact with patients with colds or respiratory diseases, it is easy to cause the baby to catch a cold again or cause other diseases, such as bronchitis or pneumonia, etc., must be isolated from patients with colds, can not be in the winter and spring seasons to take the child out, on the crowded places, such as supermarkets, shopping malls and so on.