Number of one-year-olds who are not vaccinated against diphtheria in Tanzania
Tanzania: Number of one-year-olds who are not vaccinated against diphtheria was 33.4 % change on previous year in 2023. ◆ Volatile
Number of one-year-olds who are not vaccinated against diphtheria in Tanzania, 1981–2023
Source: Statizoid (derived). Measured in % change on previous year.
Analysis
Tanzania recorded 33.4 % change on previous year for number of one-year-olds who are not vaccinated against diphtheria in 2023.
Compared with earlier readings it is up 729.3% on the previous year and up 121.1% over ten years.
Over the whole period, number of one-year-olds who are not vaccinated against diphtheria in Tanzania peaked at 107.39 % change on previous year in 2005 and was at its lowest, -65.44 % change on previous year, in 2014.
Tanzania ranks 29th of 194 countries on this measure, in the top 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 Tanzania, year by year
| Year | % change on previous year | Change |
|---|---|---|
| 1981 | 12.45 % change on previous year | — |
| 1982 | 13.59 % change on previous year | +9.2% |
| 1983 | -1.81 % change on previous year | -113.4% |
| 1984 | -10.38 % change on previous year | +472.1% |
| 1985 | -19.79 % change on previous year | +90.6% |
| 1986 | -19.82 % change on previous year | +0.2% |
| 1987 | -17.84 % change on previous year | -10.0% |
| 1988 | -27.24 % change on previous year | +52.7% |
| 1989 | 56.94 % change on previous year | -309.0% |
| 1990 | -2.33 % change on previous year | -104.1% |
| 1991 | -12.27 % change on previous year | +427.4% |
| 1992 | -8.97 % change on previous year | -26.9% |
| 1993 | 2.07 % change on previous year | -123.0% |
| 1994 | -3.75 % change on previous year | -281.3% |
| 1995 | 22.08 % change on previous year | -689.4% |
| 1996 | -2.03 % change on previous year | -109.2% |
| 1997 | 20.67 % change on previous year | -1118.6% |
| 1998 | 2.64 % change on previous year | -87.2% |
| 1999 | 17.34 % change on previous year | +556.3% |
| 2000 | -10 % change on previous year | -157.7% |
| 2001 | -36.53 % change on previous year | +265.4% |
| 2002 | -13.07 % change on previous year | -64.2% |
| 2003 | -53.3 % change on previous year | +307.7% |
| 2004 | 3.15 % change on previous year | -105.9% |
| 2005 | 107.39 % change on previous year | +3305.9% |
| 2006 | 3.4 % change on previous year | -96.8% |
| 2007 | 74.34 % change on previous year | +2087.6% |
| 2008 | -16.35 % change on previous year | -122.0% |
| 2009 | 8.53 % change on previous year | -152.2% |
| 2010 | -39.04 % change on previous year | -557.7% |
| 2011 | 13.18 % change on previous year | -133.8% |
| 2012 | -18.65 % change on previous year | -241.5% |
| 2013 | 15.11 % change on previous year | -181.0% |
| 2014 | -65.44 % change on previous year | -533.3% |
| 2015 | 38.26 % change on previous year | -158.5% |
| 2016 | 104.9 % change on previous year | +174.1% |
| 2017 | 28.3 % change on previous year | -73.0% |
| 2018 | 13.87 % change on previous year | -51.0% |
| 2019 | -15.77 % change on previous year | -213.7% |
| 2020 | 2.22 % change on previous year | -114.1% |
| 2021 | 58.6 % change on previous year | +2534.1% |
| 2022 | -5.31 % change on previous year | -109.1% |
| 2023 | 33.4 % change on previous year | -729.3% |
Tanzania compared with similar countries
- Tanzania's 33.4 % change on previous year is above the median for lower middle income countries, which is 2.01 % change on previous year, 16.6× the median. (46 countries reporting)
- Tanzania's 33.4 % change on previous year is above the median for Sub-Saharan Africa, which is 0.8149 % change on previous year, 41.0× the median. (48 countries reporting)
Biggest year-on-year movements
Years where Number of one-year-olds who are not vaccinated against diphtheria in Tanzania 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 |
|---|---|---|---|
| 2005 | +3305.9% | 3.15 % change on previous year | 107.39 % change on previous year |
| 2021 | +2534.1% | 2.22 % change on previous year | 58.6 % change on previous year |
| 2007 | +2087.6% | 3.4 % change on previous year | 74.34 % change on previous year |
Averages by decade
| Decade | Average | Lowest | Highest | Years |
|---|---|---|---|---|
| 1980s | -1.55 % change on previous year | -27.24 % change on previous year | 56.94 % change on previous year | 9 |
| 1990s | 3.54 % change on previous year | -12.27 % change on previous year | 22.08 % change on previous year | 10 |
| 2000s | 6.75 % change on previous year | -53.3 % change on previous year | 107.39 % change on previous year | 10 |
| 2010s | 7.47 % change on previous year | -65.44 % change on previous year | 104.9 % change on previous year | 10 |
| 2020s | 22.23 % change on previous year | -5.31 % change on previous year | 58.6 % change on previous year | 4 |
Countries ranked near Tanzania
- 26 South Africa 37.97 % change on previous year compare
- 27 Saint Lucia 35.24 % change on previous year compare
- 28 Kyrgyzstan 34.23 % change on previous year compare
- 30 Tajikistan 33.06 % change on previous year compare
- 31 Egypt 32.67 % change on previous year compare
- 32 Norway 32.17 % change on previous year compare
More health data for Tanzania
- Un projection of annual infant deaths, annual growth rate -1.03 % change on previous year (2100)
- Heat deaths vs projected death rates, annual growth rate 0.7342 % change on previous year (2090)
- Estimated changes in temperature-related death rates compared to projected death rates 658.6 deaths per 1,000 people (2090)
- Number of infants who die before age 1 32,514 deaths (2100)
- Neonatal tetanus - number of reported cases, gaps filled 13 (2025)
- Population ages 00-04, female, annual growth rate 1.86 % change on previous year (2025)
- Population ages 00-04, female, per unit of GDP 0.0001 units per US$ of GDP (2025)
- Population ages 00-04, female, per capita 0.0786 units per person (2025)
- Population ages 00-04, male, annual growth rate 1.89 % change on previous year (2025)
- Population ages 00-04, male, per unit of GDP 0.0001 units per US$ of GDP (2025)
Frequently asked questions
- What is number of one-year-olds who are not vaccinated against diphtheria in Tanzania?
- Number of one-year-olds who are not vaccinated against diphtheria in Tanzania was 33.4 % change on previous year in 2023, according to Statizoid (derived).
- What is the highest number of one-year-olds who are not vaccinated against diphtheria recorded in Tanzania?
- The highest recorded value was 107.39 % change on previous year in 2005.
- What is the lowest number of one-year-olds who are not vaccinated against diphtheria recorded in Tanzania?
- The lowest recorded value was -65.44 % change on previous year in 2014.
- How does Tanzania rank for number of one-year-olds who are not vaccinated against diphtheria?
- Tanzania ranks 29th out of 194 countries with data for 2023.
- Is number of one-year-olds who are not vaccinated against diphtheria rising or falling in Tanzania?
- Over the last ten years it is up 121.1%. The long-run trend across the full record is volatile.
- Where does this Tanzania 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, annual growth rate. Statizoid updates them automatically from the source API.
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CSV · JSON — 43 observations, free to reuse under Derived by Statizoid from the sources named on the page.
How this figure is calculated
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.
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
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
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.