National decision-making for the introduction of new vaccines: A systematic review, 2010-2020.

Background: Competing priorities make using a transparent and evidence-based approach important when deciding to recommend new vaccines. We conducted a literature review to document the processes and frameworks for national decision-making on new vaccine introductions and explored which key features have evolved since 2010.

Methods: We searched literature published on policymaking related to vaccine introduction from March 2010 to August 2020 in six databases.

The role of National Immunization Technical Advisory Groups (NITAG) in strengthening health system governance: Lessons from three middle-income countries-Argentina, Jordan, and South Africa (2017-2018).

Introduction: Toward the Global Vaccine Action Plan 2020 goal, almost 90% of countries have established a National Immunization Technical Advisory Group (NITAG). However, little is known about NITAG's contributions to governance.

Methods: In 2017-2018, a two-step, qualitative retrospective study was conducted.

Varicella seroprevalence and molecular epidemiology of varicella-zoster virus in Argentina, 2002.

There is limited data on immunity against varicella-zoster virus (VZV) in adults in different parts of Argentina, and it is not known which VZV strains are circulating in Argentina. The objectives of this study were as follows: (i) to evaluate seroprevalence of varicella among adults, assessing the accuracy of clinical history and determining the sociodemographic factors associated with seropositivity; and (ii) to determine the VZV strains circulating in Argentina. A cross-sectional serological survey enrolling 2,807 women aged 15 to 49 years attending public health-care settings in four cities in Argentina (i.