chapter 42 found it!

Collective poisoning!
Dean and Ling both had shocked looks on their faces, and then they immediately stood up and ran to the inpatient department.
When they arrived at the inpatient department, they found that the place was in complete chaos, and most of the nurses in the entire hospital had been transferred here.
In the ward and the corridor, too many people vomited. Almost every two minutes, they saw nurses pushing trolleys to send people to the emergency room. Everyone had an anxious...