What is the difference in reported paralytic polio cases per million between Chad and Guinea?

0.3 cases per million, with Guinea ahead.

How many years of comparable data are there for Chad and Guinea?

34 years are reported by both, from 1983 to 2023.

Where does this data come from?

World Health Organization (2019); World Health Organization (2024); Population based on various sources (2023) – with major processing by Our World in Data, published as Reported paralytic polio cases per million. Statizoid refreshes it automatically from the source and publishes the full history for both places.

Chad vs Guinea: Reported paralytic polio cases per million

Chad

3.01 cases per million

in 2023

Guinea

3.31 cases per million

in 2023

Chad rank

2nd

Guinea rank

1st

Reported paralytic polio cases per million over time

Chad
Guinea

How they compare

Guinea currently reports 3.31 cases per million against 3.01 cases per million in Chad, a difference of 0.3 cases per million.

That makes Guinea's figure about 1.1 times Chad's.

The two have swapped places 11 times across 34 shared years of data; in 1983 it was Chad ahead.

Chad ranks 2nd and Guinea ranks 1st of 199 countries.

Chad has averaged higher in every one of the 5 decades both report.

Head to head by decade

Decade	Chad	Guinea	Difference	Ahead
1980s	4.4 cases per million	2.78 cases per million	1.61 cases per million	Chad
1990s	16.47 cases per million	3.2 cases per million	13.27 cases per million	Chad
2000s	2.37 cases per million	0.5072 cases per million	1.87 cases per million	Chad
2010s	1.52 cases per million	0.0975 cases per million	1.43 cases per million	Chad
2020s	2.89 cases per million	1.77 cases per million	1.12 cases per million	Chad

Averages of every year both report within each decade.

Frequently asked questions

Which has higher reported paralytic polio cases per million, Chad or Guinea?: Guinea, at 3.31 cases per million against 3.01 cases per million in Chad as of 2023.
What is the difference in reported paralytic polio cases per million between Chad and Guinea?: 0.3 cases per million, with Guinea ahead.
How many years of comparable data are there for Chad and Guinea?: 34 years are reported by both, from 1983 to 2023.
How do Chad and Guinea rank globally for reported paralytic polio cases per million?: Chad ranks 2nd and Guinea ranks 1st of 199 countries.
Where does this data come from?: World Health Organization (2019); World Health Organization (2024); Population based on various sources (2023) – with major processing by Our World in Data, published as Reported paralytic polio cases per million. Statizoid refreshes it automatically from the source and publishes the full history for both places.

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Chad vs Guinea: Reported paralytic polio cases per million. Statizoid, drawing on World Health Organization (2019); World Health Organization (2024); Population based on various sources (2023) – with major processing by Our World in Data. Retrieved 29 September 2026, from https://reference.statizoid.com/compare/reported-paralytic-polio-cases-per-1-million-people/chad/guinea/

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<a href="https://reference.statizoid.com/compare/reported-paralytic-polio-cases-per-1-million-people/chad/guinea/">Chad vs Guinea: Reported paralytic polio cases per million</a> — Statizoid

About this data

Indicator: Reported paralytic polio cases per million
Unit: cases per million
Source: World Health Organization (2019); World Health Organization (2024); Population based on various sources (2023) – with major processing 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: 18 September 2026

Sum of wild poliovirus cases and circulating vaccine derived poliovirus cases per million people.