[1].   WHO, 2020, Routine immunization as one the most effective global public health strategies for reducing child morbidity and mortality: Vaccines protect against life-threatening diseases such as measles, tuberculosis, polio, and diphtheria, saving millions of lives annually.

[2].   Oleribe, et al., 2019, Immunization coverage in many low- and middle-income countries, including Nigeria, Immunization in Nigeria remains inadequate due to limited health-seeking behavior, chronic underfunding of health systems, and socioeconomic challenges that hinder access to services.

[3].   NPC & ICF, 2019, Survey (NDHS) revealed that only 31% of children aged 12–23 months were fully immunized in Jigawa state Nigeria.

[4].   Oleribe, et al., 2017, Immunization challenges in Nigeria Rural communities. Rural communities in Nigeria including those in Jigawa State, face additional challenges such as long distances to health facilities, poor road conditions, and financial constraints that limit access to vaccination services.

[5].   Ozawa, et al., 2012, Effect of financial incentives on health seeking behavior in Northern Nigeria: Evidence from behavioral economics suggests that even small financial incentives can significantly influence health-seeking behavior, especially among low-income households.

[6].   Fagbamigbe & Kandala, 2021, Conditional and unconditional cash transfers can improve uptake of maternal and child health services, including antenatal care, facility-based delivery, and immunization.

[7].   Yakubu, et al., 2019, Gwiwa Local Government Area (LGA) of Jigawa State is a predominantly rural region where socioeconomic constraints and limited infrastructure pose challenges to healthcare delivery and utilization.

[8].   WHO & UNICEF, 2019, Broader equity-driven efforts aimed at ensuring that no child is left behind due to financial or geographic barriers to immunization.

[9].   WHO & Gavi, 2020, Routine immunization remains one of the most cost-effective public health interventions globally, helping to prevent childhood morbidity and mortality from vaccine-preventable diseases.

[10].  NPC & ICF, 2019, UNICEF, 2021, National health surveys consistently show that routine immunization coverage often falls below recommended levels, exposing children under two to preventable health risks.

[11].  Lakew, et al., 2015, Fagbamigbe & Kandala, 2021, transportation costs pose a significant obstacle, as many caregivers in rural communities cannot afford travel to distant health facilities.

[12].  Odusanya, et al., 2008, Adedokun, et al., 2017, Yakubu, et al., 2019, In Jigawa State Nigeria, low immunization uptake has been linked to several barriers, including poor access to health facilities, limited awareness among caregivers, cultural beliefs, and financial constraints.

[13].  UNICEF, 2021, NPC & ICF, 2019, MICS, 2021, Nigeria national surveys and zero-dose landscape analyses show lower coverage in many northern states (including the North-West) and highlight distance, transport cost, and socioeconomic constraints as major demand-side barriers

[14].  Barham, T., & Maluccio, J. A., 2009, Eradicating diseases: The effect of conditional cash transfers on vaccination coverage in rural Nicaragua. Journal of Health Economics, 28(3), 611–621.

[15].  Ozawa, et al., 2012, Systematic and scoping reviews from LMICs, over the past decade conclude that monetary incentives can raise vaccine uptake, though effect sizes vary based on context, transfer size, and program design.

[16].  NPC & ICF, 2019, UNICEF, 2021, Oleribe, et al., 2017, Nigeria national surveys, The NDHS and MICS show lower coverage in many northern states, including the North-West, and highlight distance, transport cost, and socioeconomic constraints as major demand-side barriers.

[17].  Adepoju, P., 2021, Nigeria’s immunization coverage: Progress, challenges, and future directions. The Lancet Global Health, 9(3), e247–e248. https://doi.org/10.1016/S2214-109X(21)00043-6

[18].  Barham & Maluccio, 2009, Ozawa et al., 2012, Earlier economic and public health evidence also demonstrates that conditional cash transfers improve vaccination outcomes in similar low-resource contexts.

[19].  Adedokun, S. T., & Yaya, S., 2020, Correlates of childhood immunization in Nigeria: Evidence from the Demographic and Health Survey. BMC Public Health, 20(1), 1–10.

[20].  Ajzen, 1991, The Theory of Planned Behavior (TPB), explains that human behavior is influenced by three main factors: attitudes toward the behavior, subjective norms, and perceived behavioral control.

[21].  Rosenstock, et al., 1988, The health belief model (HBM), posits that individuals’ willingness to act depends on their perceived susceptibility to illness, perceived severity of the illness, perceived benefits of taking action, and perceived barriers to action.

[22].  Skinner, 1953, The Incentive Theory of Motivation (ITM) suggests that human behavior is often driven by external rewards or incentives.

[23].  Yakubu, et al., 2019, Oleribe, et al., 2017, Caregivers utilizing immunization services in northern Nigeria. Studies in northern Nigeria have shown that, caregivers utilizing immunization services are predominantly married women.

[24].  NPC & ICF, 2019, Nigeria national surveys, demonstrating that caregivers of young children in northern Nigeria are predominantly women aged 25–39 years.

[25].  uptake Odusanya et al., 2008, Adedokun & Yaya, 2020, Literacy level among gender in Northern Nigeria. Northern Nigeria has lower female educational attainment, a factor strongly associated with reduced health-seeking behavior and suboptimal immunization.

[26].  Fagbamigbe & Kandala, 2021, Occupational pattern among caregivers in rural Northern Nigeria. Occupational patterns have been observed in rural immunization studies, where most caregivers are unemployed or engaged in low-income work.