---
title: "Influenza (Flu): Symptoms, Causes, Diagnosis, Treatment"
description: "Influenza (flu) is a contagious virus that can hit fast with fever and body aches; learn symptoms, care steps, and when to get labs or help."
canonical: "https://www.vitalsvault.com/conditions/influenza"
last-updated: 2026-08-22
---

# Influenza (Flu): Symptoms, Causes, Diagnosis, Treatment

> Influenza (flu) is a contagious virus that can hit fast with fever and body aches; learn symptoms, care steps, and when to get labs or help.

---

Canonical HTML: https://www.vitalsvault.com/conditions/influenza
- [llms.txt](https://www.vitalsvault.com/llms.txt)
- [sitemap.xml](https://www.vitalsvault.com/sitemap.xml)
- [Developer portal](https://www.vitalsvault.com/developers)