Infectious disease diagnosis first requires an epidemiological history, i.e., new pneumonia requires knowledge of whether the person has been in contact with an infected person or a highly suspected infected person, or whether the person has been to an area with a high incidence of the disease, such as Wuhan or Hubei, and whether the area has recently had patients passing by on the road. Secondly, it needs to be combined with symptoms, such as fever, cough, dyspnea and other respiratory symptoms, which need to be screened at the fever clinic. In addition, in the observation of novel coronavirus pneumonia, it was found that the symptoms in the first week were similar to those of a cold and could be easily misdiagnosed as a cold. Therefore, if symptoms are suspected, the main thing to do is to recall whether similar symptoms have been observed in people who have been exposed to the disease over time and whether they have been exposed to patients who have been diagnosed with the infection in conjunction with epidemiological history. If there is indeed an epidemiological history and respiratory symptoms are present, a prompt visit to a nearby medical institution is required to confirm the diagnosis. If there is no epidemiological history, but there is still no trend of improvement a week after the appearance of respiratory symptoms, coughing aggravation, or even chest tightness and shortness of breath, you also need to go to the hospital to improve the relevant tests and do the new coronavirus pneumonia screening. Content source: Dr. You Lai