How many years of comparable data are there for Senegal 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 versus estimated cases of polio. Statizoid refreshes it automatically from the source and publishes the full history for both places.

Senegal vs Sierra Leone: Reported versus estimated cases of polio

Senegal

0 cases

in 2023

Sierra Leone

0 cases

in 2023

Senegal rank

26th

Sierra Leone rank

26th

Reported versus estimated cases of polio over time

Senegal
Sierra Leone

How they compare

Senegal 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 Senegal ahead.

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

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

Head to head by decade

Decade	Senegal	Sierra Leone	Difference	Ahead
1980s	123.1 cases	39.3 cases	83.8 cases	Senegal
1990s	4.44 cases	14.33 cases	9.89 cases	Sierra Leone
2000s	0 cases	4.5 cases	4.5 cases	Sierra Leone
2010s	1.8 cases	0.1 cases	1.7 cases	Senegal
2020s	3.5 cases	3.75 cases	0.25 cases	Sierra Leone

Averages of every year both report within each decade.

Frequently asked questions

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

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Senegal vs Sierra Leone: Reported versus estimated cases of polio. 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/reported-vs-estimated-total-number-of-paralytic-polio-cases-globally/senegal/sierra-leone/

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Paste this into a page to link back to these figures. The data itself is free to reuse under CC BY 4.0 (Our World in Data); please keep the attribution.

<a href="https://reference.statizoid.com/compare/reported-vs-estimated-total-number-of-paralytic-polio-cases-globally/senegal/sierra-leone/">Senegal vs Sierra Leone: Reported versus estimated cases of polio</a> — Statizoid

About this data

Indicator: Reported versus estimated cases of polio
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.