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Fig. 6 | BMC Medicine

Fig. 6

From: Analysis of vaccination campaign effectiveness and population immunity to support and sustain polio elimination in Nigeria

Fig. 6

Impact of different future campaign schedules. (a, b) Distributions of the change in type 1 (a) and type 2 (b) district immunity under three different campaign calendars (Table 2) from June 20th, 2015, to April 10th, 2016 (immediately following the global cessation of the use of trivalent oral polio vaccine). (c, d) Projected type 1 (c) and type 2 (d) population immunity for Zamfara state under the three different campaign calendars

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