40℃近い高熱が続いた原因不明の病気【第1424回】

[Question] I've always had a weak throat and frequently visited ENT doctors since I was little. Recently, I suddenly experienced a fever of nearly 40°C, headache, and chills for 3-4 days—something I'd never experienced before. Around the third day, my throat started to hurt. I had negative results for influenza and COVID-19 at an internal medicine clinic, a brain MRI at a neurosurgery clinic showed no abnormalities, and I received antibiotics from an ENT doctor. What exactly were my symptoms? We are accepting questions from everyone: https://forms.gle/pb4R9ZrRGMCCDg9L8