How many years of comparable data are there for Peru 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.

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

Peru

0 cases

in 2023

Sierra Leone

0 cases

in 2023

Peru rank

26th

Sierra Leone rank

26th

Reported cases of paralytic polio by world region over time

Peru
Sierra Leone

How they compare

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

The two have swapped places 1 time across 43 shared years of data; in 1980 it was Peru ahead.

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

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

Head to head by decade

Decade	Peru	Sierra Leone	Difference	Ahead
1980s	121.3 cases	39.3 cases	82 cases	Peru
1990s	0.4444 cases	14.33 cases	13.89 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 cases of paralytic polio by world region, Peru or Sierra Leone?: Peru, 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 Peru and Sierra Leone?: 0 cases, with Peru ahead.
How many years of comparable data are there for Peru and Sierra Leone?: 43 years are reported by both, from 1980 to 2023.
How do Peru and Sierra Leone rank globally for reported cases of paralytic polio by world region?: Peru 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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Peru 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 29 August 2026, from https://reference.statizoid.com/compare/the-number-of-reported-paralytic-polio-cases-by-world-region/peru/sierra-leone/

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<a href="https://reference.statizoid.com/compare/the-number-of-reported-paralytic-polio-cases-by-world-region/peru/sierra-leone/">Peru 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.