How many years of comparable data are there for Denmark and Sierra Leone?

43 years are reported by both, from 1980 to 2023.

Where does this data come from?

World Health Organization (2019); World Health Organization (2024) – processed by Our World in Data, published as Paralytic polio: estimated cases by world region. Statizoid refreshes it automatically from the source and publishes the full history for both places.

Denmark vs Sierra Leone: Paralytic polio: estimated cases by world region

Denmark

0 cases

in 2023

Sierra Leone

0 cases

in 2023

Denmark rank

26th

Sierra Leone rank

26th

Paralytic polio: estimated cases by world region over time

Denmark
Sierra Leone

How they compare

Denmark currently reports 0 cases against 0 cases in Sierra Leone, a difference of 0 cases.

Across all 43 years both countries report, Sierra Leone has been ahead every year.

Denmark ranks 26th and Sierra Leone ranks 26th of 199 countries.

Sierra Leone has averaged higher in every one of the 5 decades both report.

Head to head by decade

Decade	Denmark	Sierra Leone	Difference	Ahead
1980s	1.4 cases	275.1 cases	273.7 cases	Sierra Leone
1990s	0 cases	100.33 cases	100.33 cases	Sierra Leone
2000s	0 cases	25.02 cases	25.02 cases	Sierra Leone
2010s	0 cases	0.111 cases	0.111 cases	Sierra Leone
2020s	0 cases	7.5 cases	7.5 cases	Sierra Leone

Averages of every year both report within each decade.

Frequently asked questions

Which has higher paralytic polio: estimated cases by world region, Denmark or Sierra Leone?: Denmark, at 0 cases against 0 cases in Sierra Leone as of 2023.
What is the difference in paralytic polio: estimated cases by world region between Denmark and Sierra Leone?: 0 cases, with Denmark ahead.
How many years of comparable data are there for Denmark and Sierra Leone?: 43 years are reported by both, from 1980 to 2023.
How do Denmark and Sierra Leone rank globally for paralytic polio: estimated cases by world region?: Denmark ranks 26th and Sierra Leone ranks 26th of 199 countries.
Where does this data come from?: World Health Organization (2019); World Health Organization (2024) – processed by Our World in Data, published as Paralytic polio: estimated cases by world region. Statizoid refreshes it automatically from the source and publishes the full history for both places.

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Denmark vs Sierra Leone: Paralytic polio: estimated cases by world region. Statizoid, drawing on World Health Organization (2019); World Health Organization (2024) – processed by Our World in Data. Retrieved 29 August 2026, from https://reference.statizoid.com/compare/number-of-estimated-paralytic-polio-cases-by-world-region/denmark/sierra-leone/

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<a href="https://reference.statizoid.com/compare/number-of-estimated-paralytic-polio-cases-by-world-region/denmark/sierra-leone/">Denmark vs Sierra Leone: Paralytic polio: estimated cases by world region</a> — Statizoid

About this data

Indicator: Paralytic polio: estimated cases by world region
Unit: cases
Source: World Health Organization (2019); World Health Organization (2024) – processed 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: 28 August 2026

Total estimated number of polio cases.