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Computer model predictions of annual measles incidence pre- and post-SIA in India, under different intervals between SIAs. Each SIA is indicated by a dotted vertical line. R0 is 16 and SIAs are assumed to have 90% coverage among 6–59 month-olds. Note: The model was run for 100 years with routine vaccination to reach a postvaccination equilibrium (the last 50 years of which are shown), and finally run for a further 50 years with both routine and SIA vaccination.
