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Reported paralytic polio cases per million in Sierra Leone

Sierra Leone: Reported paralytic polio cases per million was 0 cases per million in 2023. ◆ Volatile

Latest (2023)
0 cases per million
World rank
26th
of 199 countries
All-time high
31.98 cases per million
in 1989
All-time low
0 cases per million
in 1995
Years of data
43
1980–2023

Reported paralytic polio cases per million in Sierra Leone, 1980–2023

01020301980200120231980: 3.3 cases per million1981: 14 cases per million1982: 9.4 cases per million1983: 14.2 cases per million1984: 11.5 cases per million1985: 12 cases per million1986: 3.6 cases per million1987: 3 cases per million1988: 0.986 cases per million1989: 32 cases per million1990: 8.8 cases per million1991: 13 cases per million1992: 1.2 cases per million1993: 1.2 cases per million1994: 1.6 cases per million1995: 0 cases per million1997: 0 cases per million1998: 0.674 cases per million1999: 3.1 cases per million2000: 7.4 cases per million2001: 0 cases per million2002: 0 cases per million2003: 0 cases per million2004: 0 cases per million2005: 0 cases per million2006: 0 cases per million2007: 0 cases per million2008: 0 cases per million2009: 1.8 cases per million2010: 0.155 cases per million2011: 0 cases per million2012: 0 cases per million2013: 0 cases per million2014: 0 cases per million2015: 0 cases per million2016: 0 cases per million2017: 0 cases per million2018: 0 cases per million2019: 0 cases per million2020: 1.2 cases per million2021: 0.594 cases per million2022: 0 cases per million2023: 0 cases per million

Source: World Health Organization (2019); World Health Organization (2024); Population based on various sources (2023) – with major processing by Our World in Data. Measured in cases per million.

Analysis

Sierra Leone recorded 0 cases per million for reported paralytic polio cases per million in 2023. That is the lowest value across all 43 years on record.

Over the whole period, reported paralytic polio cases per million in Sierra Leone peaked at 31.98 cases per million in 1989 and was at its lowest, 0 cases per million, in 1995.

Sierra Leone ranks 26th of 199 countries on this measure, in the top quarter.

The series is highly variable year to year, so single readings are best treated with caution.

Reported paralytic polio cases per million in Sierra Leone, year by year

Year cases per million Change
1980 3.27 cases per million —
1981 13.97 cases per million +327.5%
1982 9.4 cases per million -32.7%
1983 14.22 cases per million +51.2%
1984 11.46 cases per million -19.5%
1985 12 cases per million +4.8%
1986 3.64 cases per million -69.6%
1987 3.04 cases per million -16.6%
1988 0.9861 cases per million -67.6%
1989 31.98 cases per million +3142.7%
1990 8.79 cases per million -72.5%
1991 13.02 cases per million +48.2%
1992 1.16 cases per million -91.1%
1993 1.16 cases per million +0.1%
1994 1.62 cases per million +39.4%
1995 0 cases per million -100.0%
1997 0 cases per million —
1998 0.6742 cases per million —
1999 3.13 cases per million +364.0%
2000 7.42 cases per million +137.1%
2001 0 cases per million -100.0%
2002 0 cases per million —
2003 0 cases per million —
2004 0 cases per million —
2005 0 cases per million —
2006 0 cases per million —
2007 0 cases per million —
2008 0 cases per million —
2009 1.76 cases per million —
2010 0.1554 cases per million -91.2%
2011 0 cases per million -100.0%
2012 0 cases per million —
2013 0 cases per million —
2014 0 cases per million —
2015 0 cases per million —
2016 0 cases per million —
2017 0 cases per million —
2018 0 cases per million —
2019 0 cases per million —
2020 1.21 cases per million —
2021 0.5938 cases per million -51.1%
2022 0 cases per million -100.0%
2023 0 cases per million —

Sierra Leone compared with similar countries

  • Sierra Leone's 0 cases per million is below the median for low income countries, which is 0.0735 cases per million. (25 countries reporting)

Biggest year-on-year movements

Years where Reported paralytic polio cases per million in Sierra Leone changed far more than this series normally does. A large move can be a real event or a change in how the figure was measured — the source note below says who published it.

YearChange FromTo
1989 +3142.7% 0.9861 cases per million 31.98 cases per million

Averages by decade

DecadeAverage LowestHighest Years
1980s 10.4 cases per million 0.9861 cases per million 31.98 cases per million 10
1990s 3.28 cases per million 0 cases per million 13.02 cases per million 9
2000s 0.9174 cases per million 0 cases per million 7.42 cases per million 10
2010s 0.0155 cases per million 0 cases per million 0.1554 cases per million 10
2020s 0.4521 cases per million 0 cases per million 1.21 cases per million 4

Countries ranked near Sierra Leone

  1. 23 Tanzania 0.0297 cases per million compare
  2. 24 Pakistan 0.0249 cases per million compare
  3. 25 Indonesia 0.0216 cases per million compare
  4. 26 Albania 0 cases per million compare
  5. 26 Algeria 0 cases per million compare
  6. 26 Andorra 0 cases per million
  7. 26 Angola 0 cases per million compare
  8. 26 Antigua and Barbuda 0 cases per million
  9. 26 Argentina 0 cases per million compare
  10. 26 Armenia 0 cases per million compare
  11. 26 Australia 0 cases per million compare
  12. 26 Austria 0 cases per million compare
  13. 26 Azerbaijan 0 cases per million compare
  14. 26 Bahamas 0 cases per million
  15. 26 Bahrain 0 cases per million compare
  16. 26 Bangladesh 0 cases per million compare
  17. 26 Barbados 0 cases per million
  18. 26 Belarus 0 cases per million compare
  19. 26 Belgium 0 cases per million compare
  20. 26 Belize 0 cases per million compare
  21. 26 Bhutan 0 cases per million compare
  22. 26 Bolivia 0 cases per million compare
  23. 26 Bosnia and Herzegovina 0 cases per million
  24. 26 Botswana 0 cases per million compare
  25. 26 Brazil 0 cases per million compare
  26. 26 Brunei 0 cases per million
  27. 26 Bulgaria 0 cases per million compare
  28. 26 Cambodia 0 cases per million compare
  29. 26 Cameroon 0 cases per million compare
  30. 26 Canada 0 cases per million compare
  31. 26 Cape Verde 0 cases per million compare
  32. 26 Chile 0 cases per million compare
  33. 26 China 0 cases per million compare
  34. 26 Colombia 0 cases per million compare
  35. 26 Comoros 0 cases per million compare
  36. 26 Congo 0 cases per million compare
  37. 26 Cook Islands 0 cases per million
  38. 26 Costa Rica 0 cases per million
  39. 26 Croatia 0 cases per million
  40. 26 Cuba 0 cases per million
  41. 26 Cyprus 0 cases per million compare
  42. 26 Czechia 0 cases per million
  43. 26 Denmark 0 cases per million compare
  44. 26 Djibouti 0 cases per million compare
  45. 26 Dominica 0 cases per million
  46. 26 Dominican Republic 0 cases per million compare
  47. 26 East Timor 0 cases per million
  48. 26 Ecuador 0 cases per million compare
  49. 26 Egypt 0 cases per million compare
  50. 26 El Salvador 0 cases per million compare
  51. 26 Equatorial Guinea 0 cases per million compare
  52. 26 Eritrea 0 cases per million compare
  53. 26 Estonia 0 cases per million
  54. 26 Eswatini 0 cases per million compare
  55. 26 Ethiopia 0 cases per million compare
  56. 26 Fiji 0 cases per million
  57. 26 Finland 0 cases per million compare
  58. 26 France 0 cases per million compare
  59. 26 Gabon 0 cases per million compare
  60. 26 Gambia 0 cases per million compare
  61. 26 Georgia 0 cases per million compare
  62. 26 Germany 0 cases per million compare
  63. 26 Ghana 0 cases per million compare
  64. 26 Greece 0 cases per million compare
  65. 26 Grenada 0 cases per million
  66. 26 Guatemala 0 cases per million compare
  67. 26 Guinea-Bissau 0 cases per million compare
  68. 26 Guyana 0 cases per million
  69. 26 Haiti 0 cases per million compare
  70. 26 Honduras 0 cases per million compare
  71. 26 Hong Kong 0 cases per million
  72. 26 Hungary 0 cases per million compare
  73. 26 Iceland 0 cases per million
  74. 26 India 0 cases per million compare
  75. 26 Iran 0 cases per million compare
  76. 26 Iraq 0 cases per million compare
  77. 26 Ireland 0 cases per million compare
  78. 26 Italy 0 cases per million compare
  79. 26 Jamaica 0 cases per million compare
  80. 26 Japan 0 cases per million compare
  81. 26 Jordan 0 cases per million compare
  82. 26 Kazakhstan 0 cases per million compare
  83. 26 Kiribati 0 cases per million
  84. 26 Kuwait 0 cases per million compare
  85. 26 Kyrgyzstan 0 cases per million compare
  86. 26 Laos 0 cases per million compare
  87. 26 Latvia 0 cases per million
  88. 26 Lebanon 0 cases per million compare
  89. 26 Lesotho 0 cases per million compare
  90. 26 Liberia 0 cases per million compare
  91. 26 Libya 0 cases per million compare
  92. 26 Lithuania 0 cases per million
  93. 26 Luxembourg 0 cases per million
  94. 26 Macao 0 cases per million
  95. 26 Malawi 0 cases per million compare
  96. 26 Malaysia 0 cases per million compare
  97. 26 Maldives 0 cases per million compare
  98. 26 Malta 0 cases per million
  99. 26 Marshall Islands 0 cases per million compare
  100. 26 Mauritius 0 cases per million
  101. 26 Mexico 0 cases per million compare
  102. 26 Micronesia (country) 0 cases per million
  103. 26 Moldova 0 cases per million compare
  104. 26 Monaco 0 cases per million
  105. 26 Mongolia 0 cases per million compare
  106. 26 Montenegro 0 cases per million
  107. 26 Morocco 0 cases per million compare
  108. 26 Myanmar 0 cases per million compare
  109. 26 Namibia 0 cases per million compare
  110. 26 Nauru 0 cases per million compare
  111. 26 Nepal 0 cases per million compare
  112. 26 Netherlands 0 cases per million compare
  113. 26 New Zealand 0 cases per million
  114. 26 Nicaragua 0 cases per million compare
  115. 26 Niue 0 cases per million
  116. 26 North Korea 0 cases per million compare
  117. 26 North Macedonia 0 cases per million
  118. 26 Norway 0 cases per million compare
  119. 26 Oman 0 cases per million compare
  120. 26 Palau 0 cases per million
  121. 26 Palestine 0 cases per million
  122. 26 Panama 0 cases per million
  123. 26 Papua New Guinea 0 cases per million compare
  124. 26 Paraguay 0 cases per million compare
  125. 26 Peru 0 cases per million compare
  126. 26 Philippines 0 cases per million compare
  127. 26 Poland 0 cases per million compare
  128. 26 Portugal 0 cases per million compare
  129. 26 Qatar 0 cases per million compare
  130. 26 Reunion 0 cases per million
  131. 26 Romania 0 cases per million compare
  132. 26 Russia 0 cases per million compare
  133. 26 Rwanda 0 cases per million compare
  134. 26 Saint Helena 0 cases per million
  135. 26 Saint Kitts and Nevis 0 cases per million
  136. 26 Saint Lucia 0 cases per million
  137. 26 Saint Vincent and the Grenadines 0 cases per million
  138. 26 Samoa 0 cases per million
  139. 26 San Marino 0 cases per million
  140. 26 Sao Tome and Principe 0 cases per million compare
  141. 26 Saudi Arabia 0 cases per million compare
  142. 26 Senegal 0 cases per million compare
  143. 26 Serbia 0 cases per million compare
  144. 26 Seychelles 0 cases per million
  145. 26 Singapore 0 cases per million compare
  146. 26 Slovakia 0 cases per million
  147. 26 Slovenia 0 cases per million
  148. 26 Solomon Islands 0 cases per million
  149. 26 South Africa 0 cases per million compare
  150. 26 South Korea 0 cases per million compare
  151. 26 Spain 0 cases per million compare
  152. 26 Sri Lanka 0 cases per million compare
  153. 26 Sudan 0 cases per million compare
  154. 26 Suriname 0 cases per million compare
  155. 26 Sweden 0 cases per million compare
  156. 26 Switzerland 0 cases per million compare
  157. 26 Syria 0 cases per million compare
  158. 26 Tajikistan 0 cases per million compare
  159. 26 Thailand 0 cases per million compare
  160. 26 Togo 0 cases per million compare
  161. 26 Tonga 0 cases per million
  162. 26 Trinidad and Tobago 0 cases per million
  163. 26 Tunisia 0 cases per million compare
  164. 26 Turkey 0 cases per million compare
  165. 26 Turkmenistan 0 cases per million compare
  166. 26 Tuvalu 0 cases per million
  167. 26 Uganda 0 cases per million compare
  168. 26 Ukraine 0 cases per million compare
  169. 26 United Arab Emirates 0 cases per million compare
  170. 26 United Kingdom 0 cases per million compare
  171. 26 United States 0 cases per million compare
  172. 26 Uruguay 0 cases per million
  173. 26 Uzbekistan 0 cases per million compare
  174. 26 Vanuatu 0 cases per million compare
  175. 26 Venezuela 0 cases per million compare
  176. 26 Vietnam 0 cases per million compare

See the full ranking of 199 places →

More reference data data for Sierra Leone

All data for Sierra Leone →

Frequently asked questions

What is reported paralytic polio cases per million in Sierra Leone?
Reported paralytic polio cases per million in Sierra Leone was 0 cases per million in 2023, according to World Health Organization (2019); World Health Organization (2024); Population based on various sources (2023) – with major processing by Our World in Data.
What is the highest reported paralytic polio cases per million recorded in Sierra Leone?
The highest recorded value was 31.98 cases per million in 1989.
What is the lowest reported paralytic polio cases per million recorded in Sierra Leone?
The lowest recorded value was 0 cases per million in 1995.
How does Sierra Leone rank for reported paralytic polio cases per million?
Sierra Leone ranks 26th out of 199 countries with data for 2023.
Where does this Sierra Leone data come from?
The figures come from World Health Organization (2019); World Health Organization (2024); Population based on various sources (2023) – with major processing by Our World in Data, published as part of Reported paralytic polio cases per million. Statizoid updates them automatically from the source API.

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Reported paralytic polio cases per million in Sierra Leone. Statizoid, drawing on World Health Organization (2019); World Health Organization (2024); Population based on various sources (2023) – with major processing by Our World in Data. Retrieved 29 September 2026, from https://reference.statizoid.com/stat/reported-paralytic-polio-cases-per-1-million-people/sierra-leone/

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About this data

Indicator
Reported paralytic polio cases per million
Unit
cases per million
Source
World Health Organization (2019); World Health Organization (2024); Population based on various sources (2023) – with major processing by Our World in Data
Licence
CC BY 4.0 (Our World in Data)
Coverage
199 places, 7,608 data points, 1980–2023
Last refreshed

Sum of wild poliovirus cases and circulating vaccine derived poliovirus cases per million people.