Understanding the perspectives of susceptible and low-coverage populations is crucial to improving immunization programmes. TIP provides a framework that facilitated this in four countries. In the future, the purpose of TIP should go beyond identification of susceptible groups and diagnosis of challenges and ensure a stronger focus on the design of strategies and appropriate and effective interventions to ensure long-term change.
The Second Strategic Objective of the Global Vaccine Action Plan, "individuals and communities understand the value of vaccines and demand immunization as both their right and responsibility", differs from the other five in that it does not focus on supply-side aspects of immunization programs but rather on public demand for vaccines and immunization services. This commentary summarizes the work (literature review, consultations with experts, and with potential users) and findings of the UNICEF/World Health Organization Strategic Objective 2 informal Working Group on Vaccine Demand, which developed a definition for demand and indicators related to Strategic Objective 2. Demand for vaccines and vaccination is a complex concept that is not external to supply systems but rather encompasses the interaction between human behaviors and system structure and dynamics.
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