Number of one-year-olds who are not fully vaccinated against in Sri Lanka
Sri Lanka: Number of one-year-olds who are not fully vaccinated against was 3,246 one-year-olds in 2023. ◆ Volatile
Number of one-year-olds who are not fully vaccinated against diphtheria, pertussis and tetanus in Sri Lanka, 1980–2023
Source: WHO & UNICEF (2026); UN, World Population Prospects (2024) – processed by Our World in Data. Measured in one-year-olds.
Analysis
Sri Lanka recorded 3,246 one-year-olds for number of one-year-olds who are not fully vaccinated against diphtheria, pertussis and tetanus in 2023. That is the lowest value across all 44 years on record.
That represents a change of down 50.4% on the previous year and down 9.3% over ten years.
Over the whole period, number of one-year-olds who are not fully vaccinated against diphtheria, pertussis and tetanus in Sri Lanka peaked at 224,025 one-year-olds in 1981 and was at its lowest, 3,246 one-year-olds, in 2023.
That places Sri Lanka 128th out of 195 countries with data for 2023, putting it in the middle of the range.
The series is highly variable year to year, so single readings are best treated with caution.
Number of one-year-olds who are not fully vaccinated against in Sri Lanka, year by year
| Year | one-year-olds | Change |
|---|---|---|
| 1980 | 217,085 one-year-olds | — |
| 1981 | 224,025 one-year-olds | +3.2% |
| 1982 | 174,791 one-year-olds | -22.0% |
| 1983 | 141,267 one-year-olds | -19.2% |
| 1984 | 125,214 one-year-olds | -11.4% |
| 1985 | 105,933 one-year-olds | -15.4% |
| 1986 | 85,777 one-year-olds | -19.0% |
| 1987 | 76,529 one-year-olds | -10.8% |
| 1988 | 55,242 one-year-olds | -27.8% |
| 1989 | 41,678 one-year-olds | -24.6% |
| 1990 | 44,987 one-year-olds | +7.9% |
| 1991 | 45,513 one-year-olds | +1.2% |
| 1992 | 39,193 one-year-olds | -13.9% |
| 1993 | 32,927 one-year-olds | -16.0% |
| 1994 | 39,974 one-year-olds | +21.4% |
| 1995 | 23,554 one-year-olds | -41.1% |
| 1996 | 27,056 one-year-olds | +14.9% |
| 1997 | 10,200 one-year-olds | -62.3% |
| 1998 | 20,568 one-year-olds | +101.7% |
| 1999 | 3,447 one-year-olds | -83.2% |
| 2000 | 3,448 one-year-olds | +0.0% |
| 2001 | 6,951 one-year-olds | +101.6% |
| 2002 | 7,126 one-year-olds | +2.5% |
| 2003 | 3,622 one-year-olds | -49.2% |
| 2004 | 10,881 one-year-olds | +200.4% |
| 2005 | 3,630 one-year-olds | -66.6% |
| 2006 | 7,283 one-year-olds | +100.6% |
| 2007 | 7,310 one-year-olds | +0.4% |
| 2008 | 7,325 one-year-olds | +0.2% |
| 2009 | 10,981 one-year-olds | +49.9% |
| 2010 | 3,649 one-year-olds | -66.8% |
| 2011 | 3,629 one-year-olds | -0.6% |
| 2012 | 3,595 one-year-olds | -0.9% |
| 2013 | 3,580 one-year-olds | -0.4% |
| 2014 | 3,591 one-year-olds | +0.3% |
| 2015 | 3,559 one-year-olds | -0.9% |
| 2016 | 3,485 one-year-olds | -2.1% |
| 2017 | 3,423 one-year-olds | -1.8% |
| 2018 | 3,381 one-year-olds | -1.2% |
| 2019 | 3,353 one-year-olds | -0.8% |
| 2020 | 13,310 one-year-olds | +297.0% |
| 2021 | 13,194 one-year-olds | -0.9% |
| 2022 | 6,541 one-year-olds | -50.4% |
| 2023 | 3,246 one-year-olds | -50.4% |
Sri Lanka compared with similar countries
- Sri Lanka's 3,246 one-year-olds is below the median for upper middle income countries, which is 4,976 one-year-olds, 65% of the median. (58 countries reporting)
- Sri Lanka's 3,246 one-year-olds is below the median for South Asia, which is 18,496 one-year-olds, 18% of the median. (6 countries reporting)
Biggest year-on-year movements
Years where Number of one-year-olds who are not fully vaccinated against in Sri Lanka 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 |
|---|---|---|---|
| 2020 | +297.0% | 3,353 one-year-olds | 13,310 one-year-olds |
| 2004 | +200.4% | 3,622 one-year-olds | 10,881 one-year-olds |
Averages by decade
| Decade | Average | Lowest | Highest | Years |
|---|---|---|---|---|
| 1980s | 124,754 one-year-olds | 41,678 one-year-olds | 224,025 one-year-olds | 10 |
| 1990s | 28,742 one-year-olds | 3,447 one-year-olds | 45,513 one-year-olds | 10 |
| 2000s | 6,856 one-year-olds | 3,448 one-year-olds | 10,981 one-year-olds | 10 |
| 2010s | 3,525 one-year-olds | 3,353 one-year-olds | 3,649 one-year-olds | 10 |
| 2020s | 9,073 one-year-olds | 3,246 one-year-olds | 13,310 one-year-olds | 4 |
Countries ranked near Sri Lanka
- 125 Israel 3,535 one-year-olds compare
- 126 North Korea 3,420 one-year-olds compare
- 127 Solomon Islands 3,349 one-year-olds compare
- 129 Turkmenistan 3,183 one-year-olds compare
- 130 Botswana 3,095 one-year-olds compare
- 131 Suriname 2,993 one-year-olds compare
More health data for Sri Lanka
- Un projection of annual infant deaths, annual growth rate -1.62 % change on previous year (2100)
- Heat deaths vs projected death rates, annual growth rate 0.7332 % change on previous year (2090)
- Number of infants who die before age 1 304 deaths (2100)
- Neonatal tetanus - number of reported cases, gaps filled 0 (2025)
- Population ages 00-04, female, annual growth rate -2.13 % 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 0.0339 units per person (2025)
- Population ages 00-04, male, annual growth rate -2.12 % change on previous year (2025)
- Population ages 00-04, male, per unit of GDP 0 units per US$ of GDP (2025)
- Population ages 00-04, male, per capita 0.0353 units per person (2025)
Frequently asked questions
- What is number of one-year-olds who are not fully vaccinated against diphtheria, pertussis and tetanus in Sri Lanka?
- Number of one-year-olds who are not fully vaccinated against diphtheria, pertussis and tetanus in Sri Lanka was 3,246 one-year-olds in 2023, according to WHO & UNICEF (2026); UN, World Population Prospects (2024) – processed by Our World in Data.
- What is the highest number of one-year-olds who are not fully vaccinated against diphtheria, pertussis and tetanus recorded in Sri Lanka?
- The highest recorded value was 224,025 one-year-olds in 1981.
- What is the lowest number of one-year-olds who are not fully vaccinated against diphtheria, pertussis and tetanus recorded in Sri Lanka?
- The lowest recorded value was 3,246 one-year-olds in 2023.
- How does Sri Lanka rank for number of one-year-olds who are not fully vaccinated against diphtheria, pertussis and tetanus?
- Sri Lanka ranks 128th out of 195 countries with data for 2023.
- Is number of one-year-olds who are not fully vaccinated against diphtheria, pertussis and tetanus rising or falling in Sri Lanka?
- Over the last ten years it is down 9.3%. The long-run trend across the full record is volatile.
- Where does this Sri Lanka data come from?
- The figures come from WHO & UNICEF (2026); UN, World Population Prospects (2024) – processed by Our World in Data, published as part of Number of one-year-olds who are not fully vaccinated against diphtheria, pertussis and tetanus. Statizoid updates them automatically from the source API.
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About this data
Number of one-year-olds who have not had three doses of the combined diphtheria, tetanus and pertussis vaccine in a given year.