Bulgaria vs Syria: Number of one-year-olds who are not vaccinated against diphtheria

Bulgaria
-7.58 % change on previous year
in 2023
Syria
-11.83 % change on previous year
in 2023
Bulgaria rank
132nd
Syria rank
135th

Number of one-year-olds who are not vaccinated against diphtheria over time

  • Bulgaria
  • Syria
-1000100200300198120022023

How they compare

Bulgaria currently reports -7.58 % change on previous year against -11.83 % change on previous year in Syria, a difference of 4.25 % change on previous year.

The two have swapped places 25 times across 43 shared years of data; in 1981 it was Syria ahead.

Bulgaria ranks 132nd and Syria ranks 135th of 194 countries.

Across the 5 decades both report, Bulgaria averaged higher in 3 and Syria in 2.

Head to head by decade

Decade Bulgaria Syria Difference Ahead
1980s -7.05 % change on previous year 13.98 % change on previous year 21.02 % change on previous year Syria
1990s 23.97 % change on previous year 10.19 % change on previous year 13.78 % change on previous year Bulgaria
2000s 10.66 % change on previous year 6.79 % change on previous year 3.87 % change on previous year Bulgaria
2010s 5.68 % change on previous year 2.76 % change on previous year 2.92 % change on previous year Bulgaria
2020s 4.36 % change on previous year 7.79 % change on previous year 3.42 % change on previous year Syria

Averages of every year both report within each decade.

Frequently asked questions

Which has higher number of one-year-olds who are not vaccinated against diphtheria, Bulgaria or Syria?
Bulgaria, at -7.58 % change on previous year against -11.83 % change on previous year in Syria as of 2023.
What is the difference in number of one-year-olds who are not vaccinated against diphtheria between Bulgaria and Syria?
4.25 % change on previous year, with Bulgaria ahead.
How many years of comparable data are there for Bulgaria and Syria?
43 years are reported by both, from 1981 to 2023.
How do Bulgaria and Syria rank globally for number of one-year-olds who are not vaccinated against diphtheria?
Bulgaria ranks 132nd and Syria ranks 135th of 194 countries.
Where does this data come from?
Statizoid (derived), published as Number of one-year-olds who are not vaccinated against diphtheria, pertussis and tetanus, annual growth rate. Statizoid refreshes it automatically from the source and publishes the full history for both places.

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Bulgaria vs Syria: Number of one-year-olds who are not vaccinated against diphtheria. Statizoid, drawing on Statizoid (derived). Retrieved 17 September 2026, from https://health.statizoid.com/compare/number-of-one-year-olds-who-are-not-vaccinated-against-diphtheria-pertussis-and-tetanus-4/bulgaria/syrian-arab-republic/

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<a href="https://health.statizoid.com/compare/number-of-one-year-olds-who-are-not-vaccinated-against-diphtheria-pertussis-and-tetanus-4/bulgaria/syrian-arab-republic/">Bulgaria vs Syria: Number of one-year-olds who are not vaccinated against diphtheria</a> — Statizoid

About this data

Indicator
Number of one-year-olds who are not vaccinated against diphtheria, pertussis and tetanus, annual growth rate
Unit
% change on previous year
Source
Statizoid (derived)
Licence
Derived by Statizoid from the sources named on the page
Coverage
194 places, 7,686 data points, 1981–2023
Last refreshed

The year-on-year percentage change in Number of one-year-olds who are not vaccinated against diphtheria, pertussis and tetanus. Computed from consecutive annual observations; years either side of a gap are skipped rather than bridged.