The normal value of white blood cells in a 5-month-old baby is at 10×10⁹/L. If it is 14×10⁹/L, it is considered to be higher than normal. Usually the white blood cells of newborn babies can be as high as 15×10⁹/L~20×10⁹/L, which can drop to 12×10⁹/L one week after birth, and then usually remain at 10×10⁹/L throughout infancy, and the white blood cell count is close to the level of adults after the age of 8 years. 5-month-old baby white blood cell level 14 × 10⁹ / L, higher than the normal level, considering the existence of infection may be, need to observe the baby whether there is fever, cough, diarrhea, vomiting and so on, if necessary, can improve the chest X-ray, stool routine and other checks, can follow the doctor’s instructions oral antibacterial drugs, such as cefaclor and so on.