Fig. 4From: Analysis of vaccination campaign effectiveness and population immunity to support and sustain polio elimination in NigeriaComparison of calculated campaign effectiveness and LQAS data, using 5,770 LQAS lots matched to calculated campaign effectiveness. Curves show average campaign effectiveness and average LQAS coverage, by year. The red curve shows the mean campaign effectiveness across all age groups compared to the LQAS coverage, whereas the orange curve shows the campaign effectiveness for the 0- to 1-year-old age group specifically. The distance of the data from the blue reference curve shows the bias of the calculated campaign effectiveness compared to LQAS dataBack to article page