---
title: "Flu (Influenza): Symptoms, Causes, Treatment"
description: "Flu is a contagious viral infection that can hit fast with fever and body aches; learn symptoms, care, and when to test—no referral."
canonical: "https://www.vitalsvault.com/conditions/flu"
last-updated: 2026-08-22
---

# Flu (Influenza): Symptoms, Causes, Treatment

> Flu is a contagious viral infection that can hit fast with fever and body aches; learn symptoms, care, and when to test—no referral.

---

Canonical HTML: https://www.vitalsvault.com/conditions/flu
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