Diarrhea is not a typical symptom of a new type of pneumonia. Diarrhea is more likely to be a result of acute gastroenteritis, mostly due to the consumption of an unclean diet. Some patients may also have diarrhea and vomiting. If diarrhea is accompanied by respiratory symptoms, you should monitor the situation and seek medical attention or isolation if necessary. If the diarrhea is only simple, you can eat a light diet and avoid spicy and stimulating foods, and you can usually get better in 3-5 days.