How many years of comparable data are there for Bulgaria and Iran, Islamic Republic of?

44 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.

Bulgaria vs Iran, Islamic Republic of: Reported versus estimated cases of polio

Bulgaria

0 cases

in 2023

Iran, Islamic Republic of

0 cases

in 2023

Bulgaria rank

26th

Iran, Islamic Republic of rank

26th

Reported versus estimated cases of polio over time

Bulgaria
Iran, Islamic Republic of

How they compare

Bulgaria currently reports 0 cases against 0 cases in Iran, Islamic Republic of, a difference of 0 cases.

The two have swapped places 2 times across 44 shared years of data; in 1980 it was Iran, Islamic Republic of ahead.

Bulgaria ranks 26th and Iran, Islamic Republic of ranks 26th of 199 countries.

Iran, Islamic Republic of has averaged higher in every one of the 5 decades both report.

Head to head by decade

Decade	Bulgaria	Iran, Islamic Republic of	Difference	Ahead
1980s	1.9 cases	87.1 cases	85.2 cases	Iran, Islamic Republic of
1990s	4.6 cases	44.7 cases	40.1 cases	Iran, Islamic Republic of
2000s	0.2 cases	0.3 cases	0.1 cases	Iran, Islamic Republic of
2010s	0 cases	0 cases	0 cases	—
2020s	0 cases	0 cases	0 cases	—

Averages of every year both report within each decade.

Frequently asked questions

Which has higher reported versus estimated cases of polio, Bulgaria or Iran, Islamic Republic of?: Bulgaria, at 0 cases against 0 cases in Iran, Islamic Republic of as of 2023.
What is the difference in reported versus estimated cases of polio between Bulgaria and Iran, Islamic Republic of?: 0 cases, with Bulgaria ahead.
How many years of comparable data are there for Bulgaria and Iran, Islamic Republic of?: 44 years are reported by both, from 1980 to 2023.
How do Bulgaria and Iran, Islamic Republic of rank globally for reported versus estimated cases of polio?: Bulgaria ranks 26th and Iran, Islamic Republic of 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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Bulgaria vs Iran, Islamic Republic of: Reported versus estimated cases of polio. Statizoid, drawing on World Health Organization (2019); World Health Organization (2024) – processed by Our World in Data. Retrieved 31 August 2026, from https://reference.statizoid.com/compare/reported-vs-estimated-total-number-of-paralytic-polio-cases-globally/bulgaria/iran-islamic-rep/

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<a href="https://reference.statizoid.com/compare/reported-vs-estimated-total-number-of-paralytic-polio-cases-globally/bulgaria/iran-islamic-rep/">Bulgaria vs Iran, Islamic Republic of: 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.