Headache, dry cough, and fever - what's the cause?

Patient's question:

Symptomatic laboratory test results: Not tested
Previous treatment history and effectiveness: Took Amoxicillin, Yinqiao Detoxifying Granules, etc.
What kind of assistance is needed: Why has it not healed? What is the reason? Is it influenza A?

Doctor's answer:

History of inflammation, fever of 38.6 degrees, taking Amoxicillin and Venkang tablets, persistent low fever after fever reduction, accompanied by mild cough
Advice: Hello, persistent low fever is a relatively challenging issue in clinical diagnosis, and it is often difficult to identify a clear cause. Generally, symptomatic treatment is adopted first.
Your symptoms are persistent low fever accompanied by mild cough. Influenza typically has a body temperature below 37.3 degrees and is usually accompanied by systemic symptoms such as nausea and vomiting. Therefore, your symptoms do not resemble influenza, and you do not need to worry.
You have a history of tonsillitis, and the onset of fever is generally caused by infection. However, the subsequent persistent low fever has no clear cause, and it is considered that it may be due to other inflammation in the body.