From: The potential impact of expanding target age groups for polio immunization campaigns
Expanded age group scenario | Target age groups of SIAs (in years), by rounda | Paralytic cases prevented (2012–2015) [%] | Reduction in WPV1 elimination time (days) | Additional vaccine doses administered (through 2014) (millions) |
---|---|---|---|---|
Reference case: No expanded age groups | 0-4 (all rounds) | Reference | Reference | Reference |
Hypothetical retrospective scenarios: | Â | Â | Â | Â |
Relative coverage in under-vaccinated during Feb (bOPV) and Mar (tOPV) 2012 SIAs increased by 0.2 | 0-4 (all rounds) | 93 [53%] | 56 | 0.2 |
Expand Feb (bOPV) and Mar (tOPV) 2012 SIAs to all ages | All ages (Feb and Mar 2012); 0–4 (all other rounds) | 76 [44%] | 49 | 46.3 |
 |  | 11/10/2012 (bOPV) |  |  |
Expand Feb (bOPV) and Mar (tOPV) 2012 SIAs to all ages with relative coverage in under-vaccinated subpopulation increased by 0.2 | All ages (Feb and Mar 2012); 0–4 (all other rounds) | 130 [75%] | 302 | 46.5 |
Prospective scenarios: | Â | Â | Â | Â |
Expand Nov 2013 bOPV SIAs through 14 year olds | 0-14 (Nov 2013); 0–4 (all other rounds) | 1 [0.6%] | 17 | 9.3 |
Expand Nov 2013 bOPV SIAs to all ages | All ages (Nov 2013); 0–4 (all other rounds) | 2 [1.0%] | 32 | 29.6 |
Relative SIA coverage in under-vaccinated subpopulation increased by 0.05 from Nov 2013 on | 0-4 (all rounds) | 2 [1.2%] | 58 | 0.4 |