Table 2 Eligibility and inclusion criteria

• Review papers and research papers related to the sustainability of immunization operations in LMICs: long term effectiveness, equity, efficiency, resilience, adaptation

• Applied research

• Peer-reviewed papers and editorials

• Multidisciplinary studies describing models or methods that directly connect with SDGs

• Applied to immunization or primary health care in LMICs

(Besiou et al. 2011) [10]

• Long term perspective, capturing existing complexity

(Kovacs et al. 2019) [9]

• Real context, data, involvement of stakeholders

• Tool for decision-makers