From the book...

 

"When one ponders the meaning of “vulnerable population”, the definition will almost always lean toward a populace with a “pre-existing condition” such as the mentally challenged, the elderly or the indigent.  Over the years I have discovered that too often the vulnerability is created at the moment of the event’s beginning and is often due to the demographic itself." 

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"If we are to truly contemplate how to respond to “vulnerable populations”, we must allow ourselves a little imagination as we create our response plans.  What population COULD become vulnerable that is not normally already designated vulnerable?"