The importance of public health for twenty-first-century health care: lessons from tuberculosis.

Once epidemic, tuberculosis has re-emerged, often in newly drug-resistant forms. This public health threat calls for strong public action as well as improved private care. Action has been hampered by failures in public health infrastructure and legal-philosophical support for government intervention. Josephine Gittler's accompanying article usefully suggests rebuilding public-health agencies and adapting traditional authority and controls from the age of epidemics to take account of today's circumstances and sensibilities.