This is a clinical scenario - a 13-year-old male with acute fever, nausea, vomiting, anorexia, and post-prandial vomiting. The key differentials include enteric fever (typhoid), acute gastroenteritis, hepatitis A, and other causes of febrile illness with GI symptoms. Let me search the library in parallel.

I have excellent clinical data now. Let me read the treatment section and compile the full response.

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