"There are two basic types of disease immunity: passive and active. Passive immunity is resistance that is given to - not developed by - the creature carrying the defense. Such "outside help" provides resistance to a disease in a very short time, but that protection will eventually disappear. In some ways, passive immunity is like a youngster's winter snow fort. The easily erected play castle can provide protection during a short "battle" ... but it will melt away after a few days of sunshine. "
METAMIA is a free database of analogy and metaphor. Anyone can contribute or search. The subject matter can be anything. Science is popular, but poetry is encouraged. The goal is to integrate our fluid muses with the stark literalism of a relational database. Metamia is like a girdle for your muses, a cognitive girdle.