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Table 2 Scenarios for planned, preventive SIAs (pSIAs) with bOPV between OPV2 cessation and OPV13 cessation in OPV-using blocks

From: Managing the risk of circulating vaccine-derived poliovirus during the endgame: oral poliovirus vaccine needs

Time period RI coverage (POL3) SIA schedule showing: annual number of bOPV SIAs (day(s) of year), by SIA frequency scenario
No reduction Medium reduction Large reduction
Between OPV2 and OPV13 cessation (January 1, 2017 to April 1, 2019) 0.05 or 0.1 6 (0, 40, 80, 140, 240, 300) 4 (0, 40, 80, 240) 3 (0, 60, 120)
0.3 5 (0, 40, 80, 140, 240) 3 (0, 60, 120) 2 (0, 60)
0.6 (R0 ≤ 10) 3 (0, 60, 120) 1 (0) 1 (0)
0.6 (R0 > 10) 5 (0, 40, 80, 140, 240) 3 (0, 60, 120) 1 (0)
0.9 1 (0) 1 (0) 0
0.98 (R0 ≤ 10) 0 0 0
0.98 (R0 > 10) 1 (0) 0 0