The National Immunisation Advisory Committee (NIAC) is Ireland’s National Immunisation Technical Advisory Group (NITAG). NIAC provides independent evidence-based recommendations and advice to the Minister for Health on immunisation and related health matters to inform health policy in Ireland. 

First established in 1998, NIAC has been hosted by HIQA as a statutory function under Section 8(1)(g) of the Health Act 2007 (as amended) since 31 March 2025.

The NIAC Secretariat team, sited within the HTA Directorate provides clinical, evidence synthesis, and administrative support to NIAC.