VOA慢速英语 狼疮如何攻击身体防御系统
狼疮如何攻击身体防御系统
How Autoimmune Diseases Attack the Body's Natural Defenses
VOICE ONE:
This is SCIENCE IN THE NEWS in VOA Special English. I'm Bob Doughty.
VOICE TWO:
And I'm Barbara Klein. This week, we talk about a sickness called lupus and other autoimmune diseases. Autoimmune diseases affect the immune system – the body's natural defenses for fighting disease.
(MUSIC)
VOICE ONE:
The immune system normally protects the body against foreign materials, such as viruses and bacteria. Autoimmune diseases result from a failure of the body's own defenses against disease. The immune system loses its ability to tell the difference between foreign materials and its own cells. So, the body starts attacking its own organs and tissues.
VOICE TWO:
There are three kinds of lupus. Discoid lupus affects only the skin and can be identified by red marks on the face or neck. These marks on the skin can also be a sign of another form of lupus called systemic lupus. Systemic lupus can affect almost any organ or organ system in the body. When people talk about lupus, they usually mean the systemic form of the disease.
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