Learn interesting facts about the flu, a viral infection that targets the respiratory system. ... Credit: CAVALLINI JAMES/BSIP/Universal Images Group via Getty Images.

Is it just us or does it feel like it’s ALWAYS flu season? And you know what that means: It’s time to trudge to the doctor and get that vaccine injected into your arm or sprayed up your nose.

The flu is a contagious viral infection of the respiratory system that affects the nose, throat and lungs. It is caused by influenza viruses. Symptoms of mild flu infections can resemble those of ...

Flu facts Flu FAQ Glossary Flu pictures Discover more The flu is a contagious viral infection of the respiratory system that affects the nose, throat and lungs. It is caused by influenza viruses.

This shot of data will tell you all you need to know about the upcoming flu season.

A flu vaccine can’t give you the flu, but it might make your arm sore or cause a low-grade fever. Learn about other common side effects and rare complications.

Do you have the flu? Learn more about symptoms and treatment from abc11.com and the North Carolina Department of Health and Human Services.

Avian influenza, also called avian flu or bird flu, is an illness that usually affects only birds. There are many different strains of avian flu: 16 H subtypes and 9 N subtypes. Only those labeled H5, ...

The flu ward at Walter Reed Hospital in Bethesda, Maryland, circa World War I. | Heritage Images/GettyImages. The so-called Spanish Flu killed between 40 million and 100 million people worldwide ...

Flu: Facts about seasonal influenza and bird flu; ... (Image credit: Helder Faria/Getty Images) Flu shots known as "quadrivalent vaccines" protect against four strains of flu virus.

Bird flu pops up every year in the same way that flu season does for humans. Each time there's a different strain as mutations mix in and around wild and domestic animals. Animals, of course, get ...