Public health law in the new century.

Public health law is a broad and sometimes nebulous field which has undergone extensive reform and rethinking over the past decade. This article provides a survey of current issues in public health law, highlighting these reforms and the potential for public health legislation to deal with upcoming threats, notably bioterrorism. While recognising the anxieties bioterrorism brings, public health responses must be grounded in a coherent philosophy of risk management. Its administrators must also be aware that large-scale threats to public health are not unprecedented and that past experience can provide an important guide for future strategies.