You are viewing the site in preview mode

Skip to main content

Advertisement

Table 2 Assumed distribution of wild poliovirus serotype 1 R0 values for the different income level and current polio vaccine use strata, as used in the global model, and assumed simplified burn-in period [23]a

From: Modeling the prevalence of immunodeficiency-associated long-term vaccine-derived poliovirus excretors and the potential benefits of antiviral drugs

Income level (as of 2013) Polio vaccine(s) used (as of 2013) Population size in billions (as of 2013) Years until OPV use startsb Year until IPV-only or IPV/OPV startsb Number of assigned blocks Number of blocks assigned to each R0 (for WPV1)
4 5 6 7 8 9 10 11 12 13
Low OPV-only 0.86 33 N/A 8 0 0 0 0 0 1 3 2 1 1
Lower middle OPV-only 2.48 33 N/A 25 0 0 1 4 5 2 0 10 1 2
Upper middle OPV-only 1.87 20 N/A 19 0 0 1 16 2 0 0 0 0 0
Upper middle IPV/OPV 0.50 20 58 7 0   2 3 2 0 0 0 0 0
High IPV/OPV 0.23 10 50 2 0 0 0 2 0 0 0 0 0 0
High IPV-only 1.02 10 50 10c 2 7.7 0.3 0 0 0 0 0 0 0
  1. aDoes not include countries with unspecified income level totaling approximately 23 million people and two high-income countries that still use OPV-only totaling approximately 34 million people (all as of 2013); Assigns 67 million people in IPV/OPV-using lower middle-income countries to IPV/OPV-using upper middle-income blocks, 74 million people in IPV-only using upper middle-income countries to IPV-only-using high-income blocks, and 23 million people in OPV-only-using high-income countries to OPV-using lower or upper middle-income blocks
  2. bYears relative to beginning of burn-in period 65 years ago (i.e., 1950)
  3. cIncludes some blocks with subpopulations assigned to different R0 values