The immune system loses its ability to tell the difference between foreign materials and its own cells.

VOA: special.2010.06.15

The Northwestern University researcher took part in a study that found a way to turn off the immune system in mice with arthritis.

VOA: special.2010.03.16

Newer drugs attempt to suppress only one small part of the immune system, not all of it.

VOA: special.2009.04.14

If the immune system weakens at any point, they begin to spread and then attack.

VOA: special.2009.03.25

Autoimmune diseases affect the immune system C the body's natural defenses for fighting disease.

VOA: special.2009.04.14

Allergies are abnormal reactions of the immune system in response to otherwise harmless substances.

VOA: special.2009.07.28

Autoimmune diseases affect the immune system, the body's natural defenses for fighting disease.

VOA: special.2010.06.15

Those diseases affect the immune system the body's natural resistance to disease.

VOA: special.2009.11.24

Some drugs can be a problem because they suppress the immune system.

VOA: special.2009.04.14

The immune system is supposed to protect the body.

VOA: special.2010.11.16

In South Africa the virus, which weakens the immune system, is transmitted primarily through unsafe sex.

VOA: standard.2010.04.26

They also may use immunotherapy -- getting the body's immune system to fight the cancer.

VOA: special.2010.07.06

She says the chimpanzee tissue showed a severe loss of immune system cells.

VOA: special.2009.09.08

The sad thing is that the majority of people that are killed by malaria are children because there immune system is not strong enough to ward off this infection."

VOA: special.2009.12.22