Skip to content

Cold, Flu, & Cough Health Center

Font Size

Using Your Immune System to Stay Well

Experts explain how you can tap the power of your immune system to avoid getting sick.
WebMD Feature

You and a friend step into a crowded elevator and immediately notice two people coughing and sneezing up a storm.

Within a couple of days you come down with a bad cold -- and blame it on that elevator ride. Yet your friend -- exposed to the same germs at the same time -- remains perfectly healthy.

Recommended Related to Cold & Flu

Preventing Cold & Flu: How Doctors Keep Germs at Bay

With cold and flu season in full swing, we wondered how top docs personally battle nasty bugs each winter. Here are their expert tips for keeping pains, aches, sniffles, and sneezes at bay.

Read the Preventing Cold & Flu: How Doctors Keep Germs at Bay article > >

What made the difference? The power of the immune system. It's a network that can help us avoid illness -- or sometimes become the underlying reason we get sick.

"The strength of our immune system is what makes the difference between who gets sick and who doesn't. The one with the immune system functioning below base-line normal has an increased risk of getting sick," says Woodson Merrell, MD, director of integrative medicine at Beth Israel Medical Center in New York City.

But is there anything you can do to keep your immune system from dropping below par -- or increase its activity if it does?

Doctors say yes. And the secrets lie in understanding a bit about how the immune system works -- and how your everyday life can stoke the fires of protection.

In simplest terms, the immune system is a balanced network of cells and organs that work together to defend you against disease. It blocks foreign proteins from getting into your body. If a few happen to sneak by your biological sentry, not to worry. With a powerful "search and destroy" task force, your body deploys a host of additional immune cell forces designed to hunt down these unwanted invaders and ultimately works to destroy them.

Fending Off Illnesses

"This entire system is known as the 'humoral' response. It's your body's innate ability to manufacture antibodies that counter the infectious particle -- allowing your body to eradicate it," says Phillip Tierno Jr., PhD. He's director of clinical microbiology and diagnostic immunology at Tisch Hospital, New York University Medical Center, and author of The Secret Life of Germs.

Antibodies are proteins which can identify normal "self" cells verses foreign invading cells. They work as part of the immune system to destroy abnormal or foreign cells.

1 | 2 | 3 | 4 | 5

Today on WebMD

hot toddy
15 tips to help you feel better.
man sneezing into elbow
Do echinacea and vitamin C really help a cold?
teen girl coughing
Get a good night’s rest with these remedies.
elder berry
Eat these to fight colds, flu, and more.
Natural Cold Flu Remedies Slideshow
cold weather
Allergy And Sinus Symptom Evaluator
Boy holding ear
woman receiving vaccine shot
woman with fever
Waking up from sleep
woman with sore throat