What is it about swine flu that has people so nervous? Should seniors in particular be worried? To learn more, WebMD went to medical experts and got their answers to these and other questions about the 2009 H1N1 virus.
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.