Pathogens  - Pathogens are well "designed" as thinning agents when populations get too crowded.  Pathogens are disseminated.  Diseases are transmitted.  Pathogens plug into your battery, and wallet.  Pathogens know how to wait.  Think of a world where all the "bad pathogens" went away.  Diseases are abnormal physiological processes that cause injury and death.

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