How Long Flu Last Feverの最新情報を解説します。役立つ情報がチェックできます。

Here’s a truth bomb: the flu virus itself isn’t what makes you feel like a pile of warm misery. It’s your own immune system’s overreaction. Your body releases chemicals called cytokines, which are basically tiny, angry messengers that tell your brain, “Hey, turn up the heat, we’re at war!” This causes that bone-deep ache, the chills, and the desire to wallpaper your bedroom with used tissues.

Surprise fact: the word “influenza” comes from the Italian phrase “influenza di freddo,” meaning “influence of the cold.” Italians in the 15th century blamed the weather. Now we know it’s a shapeshifting virus that mutates faster than a teenager’s mood. And yes, you can get it in July. The flu is an equal-opportunity jerk.

A Day-by-Day Guide to Flu Stages