What is the difference in reported versus estimated cases of polio between Sierra Leone and Singapore?

0 cases, with Sierra Leone ahead.

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

42 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.

Sierra Leone vs Singapore: Reported versus estimated cases of polio

Sierra Leone

0 cases

in 2023

Singapore

0 cases

in 2023

Sierra Leone rank

26th

Singapore rank

26th

Reported versus estimated cases of polio over time

Sierra Leone
Singapore

How they compare

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

The two have swapped places 7 times across 42 shared years of data; in 1980 it was Sierra Leone ahead.

Sierra Leone ranks 26th and Singapore 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	Sierra Leone	Singapore	Difference	Ahead
1980s	42.11 cases	0.6667 cases	41.44 cases	Sierra Leone
1990s	14.33 cases	0 cases	14.33 cases	Sierra Leone
2000s	4.5 cases	0 cases	4.5 cases	Sierra Leone
2010s	0.1 cases	0 cases	0.1 cases	Sierra Leone
2020s	3.75 cases	0 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, Sierra Leone or Singapore?: Sierra Leone, at 0 cases against 0 cases in Singapore as of 2023.
What is the difference in reported versus estimated cases of polio between Sierra Leone and Singapore?: 0 cases, with Sierra Leone ahead.
How many years of comparable data are there for Sierra Leone and Singapore?: 42 years are reported by both, from 1980 to 2023.
How do Sierra Leone and Singapore rank globally for reported versus estimated cases of polio?: Sierra Leone ranks 26th and Singapore 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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Sierra Leone vs Singapore: Reported versus estimated cases of polio. Statizoid, drawing on World Health Organization (2019); World Health Organization (2024) – processed by Our World in Data. Retrieved 02 September 2026, from https://reference.statizoid.com/compare/reported-vs-estimated-total-number-of-paralytic-polio-cases-globally/sierra-leone/singapore/

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