a: Immune system ~
b: an athlete
What: "The immune system is like an athlete: To become strong and adept, it needs training and practice. Hyper-sanitized environments deny it that opportunity and keep it sedentary and out of shape."
Useful?
Writer: Mary Ruebush PhD
LCC:
Where:
Date: Aug 7 2014 4:05 PM
# 6007 Critique Analogy