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Yeah, you're right, but it's a bit more complex than that apparently. My biology memories are not so fresh, but I was referring to the notion of "adaptive immunity", here: http://www.biology.arizona.edu/immunology/tutorials/immunology/page3.html The embryo's body does, indeed, make "defense plans" for new antigens at the time it meets them, and therefore collects a huge defense memory. Kinda like a knowledge base. This summary says more, but is still a bit unclear (only the igm level of response appears to be developping after birth): http://www.larkfarm.com/AP/immune.htm ...I guess special care is a precaution for the extension of theyre immune system development, but it is already familiar to the body. Plus an example of astounding immune system response is the fact we are attacked by things that alter our cells on a daily basis, causing a small possibility of cancer. But parts of the immune system are designed to prevent this by repairing damaged cells. And while the embryo hasn't been directly exposed to those antigens (gazes, smog, cigarettes smoke, etc..), the baby and the adult have a memory of those particular antigens. Plus this makes it a little bit blurrier, even: [quote] Immunity: Natural and Acquired Long ago, physicians realized that people who had recovered from the plague would never get it again?they had acquired immunity. This is because some of the activated T and B cells become memory cells. The next time an individual meets up with the same antigen, the immune system is set to demolish it. Immunity can be strong or weak, short-lived or long-lasting, depending on the type of antigen, the amount of antigen, and the route by which it enters the body. [/quote] My understanding is that T and B cells are "activated" by a given antigen as memories. Eg. permanent templates that will allow [b]rapid cloning.[/b] As opposed to slow/random cloning. But they are "activated" and "set" to a certain configuration, suggesting they contain a global draft of all possible schemas. And to yet make this even blurrier, wikipedia suggests that the innate immune system indeed contains plans to a broad range of defenses. http://en.wikipedia.org/wiki/Immune_system#Innate_immune_system My biology teacher was clear when I asked him "is there an innate immunity of that kind for diseases like AIDS"? Now that I come to think of it... Looking forward to the answer from your wife's colleague.
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