How many years of comparable data are there for Colombia 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.

Colombia vs Sierra Leone: Reported versus estimated cases of polio

Colombia

0 cases

in 2023

Sierra Leone

0 cases

in 2023

Colombia rank

26th

Sierra Leone rank

26th

Reported versus estimated cases of polio over time

Colombia
Sierra Leone

How they compare

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

The two have swapped places 3 times across 43 shared years of data; in 1980 it was Colombia ahead.

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

Across the 5 decades both report, Colombia averaged higher in 1 and Sierra Leone in 4.

Head to head by decade

Decade	Colombia	Sierra Leone	Difference	Ahead
1980s	106 cases	39.3 cases	66.7 cases	Colombia
1990s	1.33 cases	14.33 cases	13 cases	Sierra Leone
2000s	0 cases	4.5 cases	4.5 cases	Sierra Leone
2010s	0 cases	0.1 cases	0.1 cases	Sierra Leone
2020s	0 cases	3.75 cases	3.75 cases	Sierra Leone

Averages of every year both report within each decade.

Frequently asked questions

Which has higher reported versus estimated cases of polio, Colombia or Sierra Leone?: Colombia, at 0 cases against 0 cases in Sierra Leone as of 2023.
What is the difference in reported versus estimated cases of polio between Colombia and Sierra Leone?: 0 cases, with Colombia ahead.
How many years of comparable data are there for Colombia and Sierra Leone?: 43 years are reported by both, from 1980 to 2023.
How do Colombia and Sierra Leone rank globally for reported versus estimated cases of polio?: Colombia 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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Colombia 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 01 September 2026, from https://reference.statizoid.com/compare/reported-vs-estimated-total-number-of-paralytic-polio-cases-globally/colombia/sierra-leone/

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<a href="https://reference.statizoid.com/compare/reported-vs-estimated-total-number-of-paralytic-polio-cases-globally/colombia/sierra-leone/">Colombia 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.