Tony's only symptom is a fever. He isn't vomiting. He doesn't have diarrhea. He is not as active as he usually is, but he isn't dying -- far from it.
Andis thinks Tony should rest and take it easy. He hates how Tony gets taken to hospital every time he has a little thing wrong with him.
Jenny begs to differ. She has called her mother to come to Wuxi, and she has taken Tony to the hospital.
End result? Tony gets put on the drip. He recovers, which Andis figures Tony will do anyway.