2. Adequate outdoor activities can provide additional protection for your baby. When babies' respiratory tracts are not stimulated by outside air for extended periods of time, they are more susceptible to respiratory infections.

        3. Daily good habits, the establishment of a consistent routine, adequate sleep, and a well-balanced diet.

        4. Adequately supplement with vitamin C and lactoferrin. Can cause the baby's body to trace elements in order to achieve a balanced state and cultivate the baby's protective power.