Women's understanding of immunization card and its correlation with vaccination behaviors

Background: Despite the proven effectiveness of vaccinations, vaccination uptake is limited in Nigeria. According to the Multiple Indicator Cluster Survey (MICS), one of the main barriers is the lack of accurate knowledge of the vaccination schedule. This study evaluates caregivers' knowledge of the vaccination schedule and their ability to read the immunization card. Methods: The study evaluated the knowledge of caregivers in 11 settlements in the Jada local government area of Adamawa State in September 2019. The change in knowledge among caregivers before and after referring to the immunization card was evaluated using a simple statistical hypothesis testing (chi-square test). We also used logistic regression analysis to evaluate the determinants of vaccination knowledge, as well as the correlation between knowledge and actual vaccination behaviors. Results: More than half of the women had correct knowledge of the vaccination schedule for critical vaccines. However, the knowledge of the caregivers did not improve after referring to the immunization card which contained the information. Caregivers who brought their children to the clinic for vaccination recently were more likely to know the vaccination schedule correctly. Accurate knowledge was highly correlated with the actual vaccination behaviors. Conclusion: Reference to the immunization card did not improve the knowledge of vaccination schedule, especially among the less-educated population. To increase the demand for vaccinations, one potential policy is to target the uneducated population and help them increase their knowledge.