Nagoya journal of medical science
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Primary vaccine failures can occur after high immunization coverage has been achieved. Healthcare workers' knowledge and practices are influential factors in preventing vaccine failures. Adequate knowledge and practices in the cold chain system are important to keep potency of vaccines and effectiveness of immunization. ⋯ Practices in hospitals were also better than those in health centers (P = 0.001). Knowledge and practices were significantly different between healthcare workers in hospitals and in health centers. Coverage training and regular supervision on vaccine handling and the cold chain system are recommended, especially for health centers in remote areas.