The role of the Department's Health Protection Analytical Team (HPAT) in relation to the development of the Department's immunisation policy is to carry out and advise on operational and economic analysis, including cost-effectiveness analysis. HPAT also has a role in providing standard inputs into cost-effectiveness models, such as the cost of vaccine administration by general practitioners or schools, and in the quality control of external analyses. As part of these roles HPAT provides advice on disease modelling and health economics to the Joint Committee on Vaccination and Immunisation (JCVI) at the request of the JCVI and the Department. In addition the team is involved in the evaluation of vaccine tenders in relation to cost-effectiveness and net health benefits. HPAT also provides assurance to the Departmental Chief Analyst and Economist (and thence to Ministers) of the quality of modelling, cost-effectiveness and other analysis used by the Department in immunisation policy development, including that considered by the JCVI.