This version of Field Trials of Health Interventions includes seven new chapters on conducting systematic literature reviews, trial governance, preliminary studies <span class="attribute-to-highlight medbox">and</span> pilot testing, budgeting <span class="attribute-to-highlight medbox">and</span> accounting, intervention costing <span class="attribute-to-highlight medbox">and</span> economic analysis, <span class="attribute-to-highlight medbox">and</span> Phase IV studies. Before new interventions are released into disease control programmes, it is essential that they are carefully evaluated in ‘field trials’. These may be complex <span class="attribute-to-highlight medbox">and</span> expensive undertakings, requiring the follow-up of hundreds, or thousands, of individuals, often for long periods. This manual was designed to provide guidance on the practical issues in great detail