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merriefollowshare
10-19-2007 5:10 PM165 views
merrie says:
Basics of the Immune System
Let's start at the beginning. What does it mean when someone says "I feel sick today?" What is a disease? By understanding the different kinds of diseases it is possible to see what types of disease the immune system helps you handle.
When you "get sick", your body is not able to work properly or at its full potential. There are many different ways for you to get sick -- here are some of them.
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