A small percentage of patients with novel coronavirus pneumonia present with diarrhea only, and all other symptoms are mild. Clinically, the vast majority of novel coronavirus pneumonia is characterized by fever, and although a small percentage of patients present with diarrhea, it is important to combine this with other evidence for a joint diagnosis, including the possibility of a combination of kala-azar symptoms such as mild dry cough, malaise, dyspnea, runny nose, and coughing up sputum. Typically patients may develop respiratory distress after 1 week, and in severe cases may progress to respiratory distress syndrome, sepsis, progression to uncorrectable metabolic acidosis and hemorrhagic coagulopathy. Therefore, diarrhea can only be used as a differential diagnosis. Some patients may have a mild onset of illness and may not necessarily have fever symptoms, but patients with diarrhea alone are really rare. If diarrhea is detected, other diseases or viral infections are more likely to be considered. Source: Dr. Yurai