Leukocyte 2.8×10^9/L means that the number of leukocytes in the peripheral blood is 2800/mL, which is a moderate decrease in leukocytes. As to whether leukocytes 2.8×10^9/L are hospitalized, a judgment needs to be made based on the patient’s neutrophil count and specific circumstances. If the leukocyte count is 2.8×10^9/L and the neutrophil count is greater than 1.5×10^9/L, while the patient does not have obvious symptoms such as fever and malaise, it is likely that the disease is called pseudoleukopenia, also known as benign leukopenia, which is caused by an abnormal distribution of leukocytes, resulting in a decrease in the number of leukocytes in the peripheral blood. In this case, hospitalization is usually not required for the time being, and regular observation of blood count changes is sufficient. However, if the total leukocyte count is 2.8×10^9/L and the neutrophil count is less than 1.0×10^9/L, and the patient has fever and other symptoms, it is better to be hospitalized and given anti-infection treatment after hospitalization, and at the same time, the patient can be treated with drugs to raise the leukocyte count, which is very beneficial to the patient’s recovery.