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

25 years are reported by both, from 1979 to 2011.

Where does this data come from?

Statizoid (derived), published as Pertussis - number of reported cases, gaps filled. Statizoid refreshes it automatically from the source and publishes the full history for both places.

Sierra Leone vs Tuvalu: Pertussis - number of reported cases, gaps filled

Sierra Leone

in 2025

Tuvalu

in 2012

Sierra Leone rank

137th

Tuvalu rank

137th

Pertussis - number of reported cases, gaps filled over time

Sierra Leone
Tuvalu

How they compare

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

The two have swapped places 2 times across 25 shared years of data; in 1979 it was Sierra Leone ahead.

Sierra Leone ranks 137th and Tuvalu ranks 137th of 210 countries.

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

Head to head by decade

Decade	Sierra Leone	Tuvalu	Difference	Ahead
1970s	1,425	1	1,424	Sierra Leone
1980s	1,160	0.2222	1,159	Sierra Leone
1990s	0	0	0	—
2000s	1.73	0	1.73	Sierra Leone
2010s	20.12	0	20.12	Sierra Leone

Averages of every year both report within each decade.

Frequently asked questions

Which has higher pertussis - number of reported cases, gaps filled, Sierra Leone or Tuvalu?: Sierra Leone, at 0 against 0 in Tuvalu as of 2025.
What is the difference in pertussis - number of reported cases, gaps filled between Sierra Leone and Tuvalu?: 0, with Sierra Leone ahead.
How many years of comparable data are there for Sierra Leone and Tuvalu?: 25 years are reported by both, from 1979 to 2011.
How do Sierra Leone and Tuvalu rank globally for pertussis - number of reported cases, gaps filled?: Sierra Leone ranks 137th and Tuvalu ranks 137th of 210 countries.
Where does this data come from?: Statizoid (derived), published as Pertussis - number of reported cases, gaps filled. Statizoid refreshes it automatically from the source and publishes the full history for both places.

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Sierra Leone vs Tuvalu: Pertussis - number of reported cases, gaps filled. Statizoid, drawing on Statizoid (derived). Retrieved 03 September 2026, from https://health.statizoid.com/compare/pertussis-number-of-reported-cases-gaps-filled/sierra-leone/tuvalu/

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<a href="https://health.statizoid.com/compare/pertussis-number-of-reported-cases-gaps-filled/sierra-leone/tuvalu/">Sierra Leone vs Tuvalu: Pertussis - number of reported cases, gaps filled</a> — Statizoid

About this data

Indicator: Pertussis - number of reported cases, gaps filled
Source: Statizoid (derived)
Licence: Derived by Statizoid from the sources named on the page
Coverage: 223 places, 9,846 data points, 1974–2025
Last refreshed: 01 September 2026

Pertussis - number of reported cases with 623 missing years estimated by linear interpolation between the nearest real observations. Only gaps of 4 years or fewer are filled, and never beyond the first or last actual measurement — these are filled holes, not forecasts.