The Immune System I gave the February 8, 2001, issue, which contained the article “Sentinels That Protect Your Health,” to a doctor who is involved with preventive medicine. He was happy with the picture on page 15 that shows the white blood cells attacking the bacteria. He enlarged it and put it in a frame, and he is now using it to explain the immune system.

H. K., Japan

I am a doctor, and I learned about immunology when I was a medical student. The textbook explanation of the immune system was difficult to understand, but this article was wonderful. It summarizes the subject in a manner that is easy to understand. A lecturer once said that when we study the immune system, we can’t logically avoid the thought that God made it. I am looking forward to more wonderful articles on the human body.

N. K., Japan