41. Immune System
Adaptive Immunity
Problem 11b
Textbook Question
Textbook QuestionIn developed countries, an enormous change has occurred within the human body over the past century—the loss of parasitic worms. Due to improvements in sanitation, roundworms that have inhabited human intestines (such as the hookworm above) and challenged our immune system for millions of years are no longer a threat. Does the end of this long-term relationship come at a cost? What is the hygiene hypothesis? What correlation does it attempt to explain?
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