A new study published by The Lancet Global Health exploring the association between unvaccinated children and the socioeconomic environment in which they live found that India has made tremendous progress in reaching children with routine immunization, as zero-dose children in India declined threefold from 33 per cent in 1992 to 10 per cent in 2016. The study finding revealed that in 2016, around 2.9 million unvaccinated children in India remained concentrated among the poor households and among children born to mothers with no formal education. The Lancet paper titled, “Progress in reaching unvaccinated (zero-dose) children in India, 1992-2016: a multilevel, geospatial analysis of repeated cross-sectional surveys” by Dr. Sunil Rajpal from FLAME University, Pune, and colleagues analysed four rounds of national survey data to understand how social, economic and geographical inequalities in India shaped the chances of children remaining unvaccinated or children who do not receive routine immunization, between 1992 and 2016. The study employed multilevel, geospatial tools to analyze repeated cross-sectional surveys of all four rounds (1992-2016) of India’s National Family Health Survey to study prevalence, distribution, and drivers of zero-dose vaccination status.