An epidemiological riddle -- Cholera in London : the ghost maps of Dr. Snow -- AIDS : the epidemiology of a new disease -- A different kind of epidemic -- Anatomy of an outbreak : New York's Rockefeller drug laws and the prison pump -- Orders of magnitude : the scale of mass incarceration -- A self-sustaining epidemic -- Chronic incapacitation : the long tail of mass incarceration -- The contagion of punishment : collateral damage to children and families of prisoners -- Ending mass incarceration : a public health model.