The current reference to the outbreak is mainly to neocoronavirus pneumonia. Leukemia and new coronavirus pneumonia are not related, and their causes and symptoms are different. 1. Leukemia: mostly due to viral infection, chemical, physical, genetic and other factors, causing cell gene changes, manifested as malignant cloning of hematopoietic stem progenitor cells, uncontrolled proliferation, differentiation disorders and apoptosis blockage. There are various types of leukemia, mainly divided into myeloid and lymphoid leukemia. Clinical manifestations vary according to the type of leukemia, and most of them are anemia, fever, infection, hemorrhage, liver, spleen and lymph node enlargement. 2. New coronavirus pneumonia: this disease is caused by new coronavirus infection, which can manifest as fever, dry cough, fatigue. Nasal congestion, runny nose, sore throat, decreased or loss of smell and taste, conjunctivitis, muscle pain, and diarrhea, etc. However, some patients do not have clinical manifestations and only have a positive respiratory novel coronavirus pathogenicity test. The prognosis is generally good, and some severe can develop acute respiratory distress syndrome or sepsis, shock, and even death. Leukemia and epidemics have no relationship, if the above symptoms, it is recommended to timely visit the hospital, clear disease, timely treatment, so as not to delay the condition. [Tip] This article refers to the “new coronary pneumonia, new coronary virus pneumonia”, etc., has been December 26, 2022, the National Health Commission issued a notice to change the name to “new coronary virus infection”.