A child’s fever is not necessarily a new coronavirus. There are many causes of fever in children, and there are two major causes: one is infectious factors; the other is non-infectious factors. Infectious factors include viruses, bacteria, mycoplasma, chlamydia, and non-infectious factors include rheumatoid immune diseases, hematologic disorders, tumors, and so on. Of course, pediatrics have the most infectious factors, and upper respiratory tract infections account for the majority of infectious factors. Children with fever should be observed for duration, magnitude, accompanying symptoms, as well as mental and appetite status. During the new coronavirus epidemic children have fever, parents will think of whether the new coronavirus pneumonia is normal, but with the following conditions: First, the epidemiological history of the new coronavirus, to contact with confirmed, suspected new coronavirus pneumonia patients or parents indirectly contact with these patients. Second, clinical manifestations of fever, dry cough and malaise, lung CT showing lung imaging characteristic of viral infection. Third, routine blood tests show a normal or decreased total white blood cell count and a decreased lymphocyte count. Nucleic acid testing and viral gene sequencing can be done if any of the above three clinical manifestations or epidemiologic history are present, and the diagnosis can be confirmed if there is a positive nucleic acid or if the gene sequencing is highly homologous to a known novel coronavirus.