Facebook Pixel

Flu

The Latest in Flu

Flu Definition

Definition

The flu is an infection. It affects the respiratory system. The flu is caused by a virus.

The Upper Respiratory Tract

© 2009 Nucleus Medical Art, Inc.

View Flu Definition & Overview
Get Email Updates

Flu Guide

Have a question? We're here to help. Ask the Community.

ASK

Health Newsletter

Receive the latest and greatest in women's health and wellness from EmpowHER - for free!