Whether a baby’s white blood cells of 15×10/L need fluids depends on what kind of disease it has, and the diagnosis is divided into locoregional and qualitative. If it is pneumonia, it may also have a leukocyte of 15×10/L, at which point it needs fluids and the course of treatment is at least two weeks. If it is an upper respiratory tract infection, the white blood cell is 15×10/L, the child does not have a fever, and the age is 1-3 years old, that is, when using oral preparations, the child’s gastrointestinal and digestive tract can tolerate it is not necessary to hang water. If the baby vomits a lot and the white blood cells are 15×10/L, then only infusion treatment is possible. So in summary, the examination does not clarify where the disease is located? What is the disease, i.e., qualitative? We are not sure if fluids are needed.