Immunization coverage among children aged 12-23 months: A cross sectional study in low performing blocks of Bihar, India.

Introduction: Immunization is one of the most cost-effective measures in public health to date, preventing at an approximately 2 to 3 million fatalities in young children every year. As per recent World Health Organisation (WHO) bulletin, these lifesaving vaccines have been successfully averted around 20 million premature deaths and 500 million disease cases. Inspite of this progress the routine vaccine coverage is slow to rise as challenges still live for the underserved, inaccessible and vulnerable children. It is therefore essential to evaluate the coverage of immunization at periodic intervals and to take the required measures to enhance the vaccination status in the State Bihar.