How many years of comparable data are there for Cameroon 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 Reported cases of paralytic polio by world region. Statizoid refreshes it automatically from the source and publishes the full history for both places.

Cameroon vs Sierra Leone: Reported cases of paralytic polio by world region

Cameroon

0 cases

in 2023

Sierra Leone

0 cases

in 2023

Cameroon rank

26th

Sierra Leone rank

26th

Reported cases of paralytic polio by world region over time

Cameroon
Sierra Leone

How they compare

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

The two have swapped places 9 times across 43 shared years of data; in 1980 it was Cameroon ahead.

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

Across the 5 decades both report, Cameroon averaged higher in 3 and Sierra Leone in 2.

Head to head by decade

Decade	Cameroon	Sierra Leone	Difference	Ahead
1980s	156.8 cases	39.3 cases	117.5 cases	Cameroon
1990s	26.44 cases	14.33 cases	12.11 cases	Cameroon
2000s	2.1 cases	4.5 cases	2.4 cases	Sierra Leone
2010s	1.3 cases	0.1 cases	1.2 cases	Cameroon
2020s	3.25 cases	3.75 cases	0.5 cases	Sierra Leone

Averages of every year both report within each decade.

Frequently asked questions

Which has higher reported cases of paralytic polio by world region, Cameroon or Sierra Leone?: Cameroon, at 0 cases against 0 cases in Sierra Leone as of 2023.
What is the difference in reported cases of paralytic polio by world region between Cameroon and Sierra Leone?: 0 cases, with Cameroon ahead.
How many years of comparable data are there for Cameroon and Sierra Leone?: 43 years are reported by both, from 1980 to 2023.
How do Cameroon and Sierra Leone rank globally for reported cases of paralytic polio by world region?: Cameroon 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 Reported cases of paralytic polio by world region. Statizoid refreshes it automatically from the source and publishes the full history for both places.

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Cameroon vs Sierra Leone: Reported cases of paralytic polio by world region. Statizoid, drawing on World Health Organization (2019); World Health Organization (2024) – processed by Our World in Data. Retrieved 30 August 2026, from https://reference.statizoid.com/compare/the-number-of-reported-paralytic-polio-cases-by-world-region/cameroon/sierra-leone/

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<a href="https://reference.statizoid.com/compare/the-number-of-reported-paralytic-polio-cases-by-world-region/cameroon/sierra-leone/">Cameroon vs Sierra Leone: Reported cases of paralytic polio by world region</a> — Statizoid

About this data

Indicator: Reported cases of paralytic polio 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

Sum of wild poliovirus cases and circulating vaccine derived poliovirus cases.