Originally established in 1985 to set forth evidence-based strategies for polio eradication, the PAHO Regional Technical Advisory Group (TAG) has presided 20 meetings to date. Progressively expanding its mandate to the current aim of strengthening the immunization policy dialogue among key stakeholders in the Americas involved in efforts to control vaccine-preventable diseases, TAG functions as the leading regional forum to review and promote regional goals and strategies for immunization. Specifically, the TAG reviews national immunization program progress and results, assists in the identification of research needs, and oversees the progress of research efforts in course. The XXI TAG meeting was held last July 3 to 5 2013 in Quito, Ecuador.  pdf 21 TAG Final Report, 2013