Diphtheria - number of reported cases in New Zealand
New Zealand: Diphtheria - number of reported cases was 4 in 2025. ◆ Volatile
Diphtheria - number of reported cases in New Zealand, 1974–2025
Source: World Health Organization, Global Health Observatory.
Analysis
New Zealand recorded 4 for diphtheria - number of reported cases in 2025.
Compared with earlier readings it is up 100.0% on the previous year and up 100.0% over ten years.
Over the whole period, diphtheria - number of reported cases in New Zealand peaked at 21 in 1974 and was at its lowest, 0, in 1981.
That places New Zealand 41st out of 210 countries with data for 2025, putting it in the top quarter.
The series is highly variable year to year, so single readings are best treated with caution.
Diphtheria - number of reported cases in New Zealand, year by year
| Year | Value | Change |
|---|---|---|
| 1974 | 21 | — |
| 1975 | 1 | -95.2% |
| 1976 | 6 | +500.0% |
| 1977 | 1 | -83.3% |
| 1978 | 1 | +0.0% |
| 1979 | 1 | +0.0% |
| 1980 | 1 | +0.0% |
| 1981 | 0 | -100.0% |
| 1982 | 1 | — |
| 1983 | 4 | +300.0% |
| 1984 | 2 | -50.0% |
| 1985 | 0 | -100.0% |
| 1986 | 1 | — |
| 1987 | 2 | +100.0% |
| 1988 | 0 | -100.0% |
| 1989 | 0 | — |
| 1990 | 0 | — |
| 1991 | 0 | — |
| 1992 | 0 | — |
| 1993 | 0 | — |
| 1994 | 0 | — |
| 1995 | 0 | — |
| 1997 | 0 | — |
| 1998 | 1 | — |
| 1999 | 0 | -100.0% |
| 2000 | 0 | — |
| 2001 | 0 | — |
| 2002 | 1 | — |
| 2003 | 0 | -100.0% |
| 2004 | 0 | — |
| 2005 | 0 | — |
| 2006 | 0 | — |
| 2007 | 0 | — |
| 2009 | 0 | — |
| 2010 | 0 | — |
| 2011 | 20 | — |
| 2012 | 0 | -100.0% |
| 2013 | 0 | — |
| 2014 | 2 | — |
| 2015 | 2 | +0.0% |
| 2016 | 1 | -50.0% |
| 2017 | 1 | +0.0% |
| 2018 | 0 | -100.0% |
| 2019 | 1 | — |
| 2020 | 0 | -100.0% |
| 2021 | 0 | — |
| 2022 | 2 | — |
| 2024 | 2 | +0.0% |
| 2025 | 4 | +100.0% |
Biggest year-on-year movements
Years where Diphtheria - number of reported cases in New Zealand 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 |
|---|---|---|---|
| 1976 | +500.0% | 1 | 6 |
Averages by decade
| Decade | Average | Lowest | Highest | Years |
|---|---|---|---|---|
| 1970s | 5.17 | 1 | 21 | 6 |
| 1980s | 1.1 | 0 | 4 | 10 |
| 1990s | 0.1111 | 0 | 1 | 9 |
| 2000s | 0.1111 | 0 | 1 | 9 |
| 2010s | 2.7 | 0 | 20 | 10 |
| 2020s | 1.6 | 0 | 4 | 5 |
Countries ranked near New Zealand
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Frequently asked questions
- What is diphtheria - number of reported cases in New Zealand?
- Diphtheria - number of reported cases in New Zealand was 4 in 2025, according to World Health Organization, Global Health Observatory.
- What is the highest diphtheria - number of reported cases recorded in New Zealand?
- The highest recorded value was 21 in 1974.
- What is the lowest diphtheria - number of reported cases recorded in New Zealand?
- The lowest recorded value was 0 in 1981.
- How does New Zealand rank for diphtheria - number of reported cases?
- New Zealand ranks 41st out of 210 countries with data for 2025.
- Is diphtheria - number of reported cases rising or falling in New Zealand?
- Over the last ten years it is up 100.0%. The long-run trend across the full record is volatile.
- Where does this New Zealand data come from?
- The figures come from World Health Organization, Global Health Observatory, published as part of Diphtheria - number of reported cases. Statizoid updates them automatically from the source API.
Download this data
CSV · JSON — 49 observations, free to reuse under CC BY-NC-SA 3.0 IGO (WHO).