Maybe the food sanitation in Wuhan makes diarrhea so common they didn't consider a symptom? Maybe it's a cultural taboo to mention it?
The food sanitation in Wuhan?
The pics I've seen of Wuhan make it look like a major, modern city. One never knows, though, in terms of differences between the shiny downtown and poorer areas, but I'd be surprised if such a developed-looking city had issues with widespread diarrhea to the point of masking the symptoms of a new infection.
![[Linked Image from aljazeera.com]](https://www.aljazeera.com/mritems/Images/2020/3/30/c51eae940a2b42fbaa582b5d4a7cdfde_18.jpg)