Number of one-year-olds who are not vaccinated against diphtheria in Portugal
Portugal: Number of one-year-olds who are not vaccinated against diphtheria was 0.009 one-year-olds per square kilometre in 2023. ◆ Volatile
Number of one-year-olds who are not vaccinated against diphtheria in Portugal, 1980–2023
Source: Statizoid (derived). Measured in one-year-olds per square kilometre.
Analysis
In 2023, number of one-year-olds who are not vaccinated against diphtheria in Portugal stood at 0.009 one-year-olds per square kilometre. That is the lowest value across all 44 years on record.
The figure is down 0.1% on the previous year and down 55.7% over ten years.
Over the whole period, number of one-year-olds who are not vaccinated against diphtheria in Portugal peaked at 0.4655 one-year-olds per square kilometre in 1980 and was at its lowest, 0.009 one-year-olds per square kilometre, in 2023.
That places Portugal 176th out of 192 countries with data for 2023, putting it in the bottom quarter.
The series is highly variable year to year, so single readings are best treated with caution.
Number of one-year-olds who are not vaccinated against diphtheria in Portugal, year by year
| Year | one-year-olds per square kilometre | Change |
|---|---|---|
| 1980 | 0.4655 one-year-olds per square kilometre | — |
| 1981 | 0.4168 one-year-olds per square kilometre | -10.4% |
| 1982 | 0.3545 one-year-olds per square kilometre | -14.9% |
| 1983 | 0.3361 one-year-olds per square kilometre | -5.2% |
| 1984 | 0.3435 one-year-olds per square kilometre | +2.2% |
| 1985 | 0.4239 one-year-olds per square kilometre | +23.4% |
| 1986 | 0.2737 one-year-olds per square kilometre | -35.4% |
| 1987 | 0.23 one-year-olds per square kilometre | -16.0% |
| 1988 | 0.248 one-year-olds per square kilometre | +7.8% |
| 1989 | 0.1522 one-year-olds per square kilometre | -38.7% |
| 1990 | 0.137 one-year-olds per square kilometre | -10.0% |
| 1991 | 0.0485 one-year-olds per square kilometre | -64.6% |
| 1992 | 0.0728 one-year-olds per square kilometre | +50.1% |
| 1993 | 0.0865 one-year-olds per square kilometre | +18.7% |
| 1994 | 0.0368 one-year-olds per square kilometre | -57.4% |
| 1995 | 0.0839 one-year-olds per square kilometre | +127.9% |
| 1996 | 0.0583 one-year-olds per square kilometre | -30.5% |
| 1997 | 0.0702 one-year-olds per square kilometre | +20.4% |
| 1998 | 0.0358 one-year-olds per square kilometre | -49.0% |
| 1999 | 0.0363 one-year-olds per square kilometre | +1.3% |
| 2000 | 0.0487 one-year-olds per square kilometre | +34.0% |
| 2001 | 0.0371 one-year-olds per square kilometre | -23.7% |
| 2002 | 0.0248 one-year-olds per square kilometre | -33.2% |
| 2003 | 0.0123 one-year-olds per square kilometre | -50.4% |
| 2004 | 0.0613 one-year-olds per square kilometre | +398.5% |
| 2005 | 0.084 one-year-olds per square kilometre | +36.9% |
| 2006 | 0.0355 one-year-olds per square kilometre | -57.7% |
| 2007 | 0.035 one-year-olds per square kilometre | -1.6% |
| 2008 | 0.0338 one-year-olds per square kilometre | -3.4% |
| 2009 | 0.0446 one-year-olds per square kilometre | +32.1% |
| 2010 | 0.0218 one-year-olds per square kilometre | -51.1% |
| 2011 | 0.0324 one-year-olds per square kilometre | +48.2% |
| 2012 | 0.0215 one-year-olds per square kilometre | -33.4% |
| 2013 | 0.0203 one-year-olds per square kilometre | -5.6% |
| 2014 | 0.0188 one-year-olds per square kilometre | -7.5% |
| 2015 | 0.018 one-year-olds per square kilometre | -4.3% |
| 2016 | 0.0183 one-year-olds per square kilometre | +1.7% |
| 2017 | 0.0188 one-year-olds per square kilometre | +2.9% |
| 2018 | 0.0095 one-year-olds per square kilometre | -49.8% |
| 2019 | 0.0095 one-year-olds per square kilometre | +0.1% |
| 2020 | 0.0095 one-year-olds per square kilometre | +0.5% |
| 2021 | 0.0094 one-year-olds per square kilometre | -1.3% |
| 2022 | 0.009 one-year-olds per square kilometre | -4.1% |
| 2023 | 0.009 one-year-olds per square kilometre | -0.1% |
Portugal compared with similar countries
- Portugal's 0.009 one-year-olds per square kilometre is below the median for high income countries, which is 0.048 one-year-olds per square kilometre, 19% of the median. (63 countries reporting)
- Portugal's 0.009 one-year-olds per square kilometre is below the median for Europe & Central Asia, which is 0.0516 one-year-olds per square kilometre, 17% of the median. (51 countries reporting)
Biggest year-on-year movements
Years where Number of one-year-olds who are not vaccinated against diphtheria in Portugal changed far more than this series normally does. A large move can be a real event or a change in how the figure was measured — the source note below says who published it.
| Year | Change | From | To |
|---|---|---|---|
| 2004 | +398.5% | 0.0123 one-year-olds per square kilometre | 0.0613 one-year-olds per square kilometre |
Averages by decade
| Decade | Average | Lowest | Highest | Years |
|---|---|---|---|---|
| 1980s | 0.3244 one-year-olds per square kilometre | 0.1522 one-year-olds per square kilometre | 0.4655 one-year-olds per square kilometre | 10 |
| 1990s | 0.0666 one-year-olds per square kilometre | 0.0358 one-year-olds per square kilometre | 0.137 one-year-olds per square kilometre | 10 |
| 2000s | 0.0417 one-year-olds per square kilometre | 0.0123 one-year-olds per square kilometre | 0.084 one-year-olds per square kilometre | 10 |
| 2010s | 0.0189 one-year-olds per square kilometre | 0.0095 one-year-olds per square kilometre | 0.0324 one-year-olds per square kilometre | 10 |
| 2020s | 0.0092 one-year-olds per square kilometre | 0.009 one-year-olds per square kilometre | 0.0095 one-year-olds per square kilometre | 4 |
Countries ranked near Portugal
- 173 Chile 0.0099 one-year-olds per square kilometre compare
- 174 Uruguay 0.0096 one-year-olds per square kilometre compare
- 175 Cuba 0.0092 one-year-olds per square kilometre compare
- 177 Belarus 0.0075 one-year-olds per square kilometre compare
- 178 Iran 0.0074 one-year-olds per square kilometre compare
- 179 Saudi Arabia 0.007 one-year-olds per square kilometre compare
More health data for Portugal
- Un projection of annual infant deaths, annual growth rate -2.56 % change on previous year (2100)
- Heat deaths vs projected death rates, annual growth rate -0.1616 % change on previous year (2090)
- Estimated changes in temperature-related death rates compared to projected death rates 1,112 deaths per 1,000 people (2090)
- Number of infants who die before age 1 38 deaths (2100)
- Neonatal tetanus - number of reported cases, gaps filled 0 (2025)
- Population ages 00-04, female, annual growth rate 1.39 % change on previous year (2025)
- Population ages 00-04, female, per unit of GDP 0 units per US$ of GDP (2025)
- Population ages 00-04, female, per capita 0.0199 units per person (2025)
- Population ages 00-04, male, annual growth rate 1.15 % change on previous year (2025)
- Population ages 00-04, male, per unit of GDP 0 units per US$ of GDP (2025)
Frequently asked questions
- What is number of one-year-olds who are not vaccinated against diphtheria in Portugal?
- Number of one-year-olds who are not vaccinated against diphtheria in Portugal was 0.009 one-year-olds per square kilometre in 2023, according to Statizoid (derived).
- What is the highest number of one-year-olds who are not vaccinated against diphtheria recorded in Portugal?
- The highest recorded value was 0.4655 one-year-olds per square kilometre in 1980.
- What is the lowest number of one-year-olds who are not vaccinated against diphtheria recorded in Portugal?
- The lowest recorded value was 0.009 one-year-olds per square kilometre in 2023.
- How does Portugal rank for number of one-year-olds who are not vaccinated against diphtheria?
- Portugal ranks 176th out of 192 countries with data for 2023.
- Is number of one-year-olds who are not vaccinated against diphtheria rising or falling in Portugal?
- Over the last ten years it is down 55.7%. The long-run trend across the full record is volatile.
- Where does this Portugal data come from?
- The figures come from Statizoid (derived), published as part of Number of one-year-olds who are not vaccinated against diphtheria, pertussis and tetanus, per square kilometre. Statizoid updates them automatically from the source API.
Download this data
CSV · JSON — 44 observations, free to reuse under Derived by Statizoid from the sources named on the page.
How this figure is calculated
Number of one-year-olds who are not vaccinated against diphtheria, pertussis and tetanus divided by Land area (sq. km), matched on country and year. Neither publisher issues this ratio as a series; it is computed here from both.
Number of one-year-olds who are not vaccinated against diphtheria, pertussis and tetanus ÷ Land area (sq. km)
Computed from
- Number of one-year-olds who are not vaccinated against diphtheria, pertussis and tetanus WHO & UNICEF (2025); UN, World Population Prospects (2024) – processed by Our World in Data
- Land area FAOSTAT, Food and Agriculture Organization of the United Nations (FAO)
Statizoid computes this series; the underlying measurements belong to the publishers named above. The arithmetic is applied to every country and year where both inputs report, and nothing is estimated unless the page says so.
About this data
Number of one-year-olds who are not vaccinated against diphtheria, pertussis and tetanus divided by Land area (sq. km), matched on country and year. Neither publisher issues this ratio as a series; it is computed here from both.