Diphtheria - number of reported cases, gaps filled in Western Pacific (WHO region)
Western Pacific (WHO region): Diphtheria - number of reported cases, gaps filled was 428 in 2025. ◆ Volatile
Diphtheria - number of reported cases, gaps filled in Western Pacific (WHO region), 1980–2025
Source: Statizoid (derived).
Analysis
In 2025, diphtheria - number of reported cases, gaps filled in Western Pacific (WHO region) stood at 428.
The figure is down 64.6% on the previous year and up 89.4% over ten years.
Over the whole period, diphtheria - number of reported cases, gaps filled in Western Pacific (WHO region) peaked at 18,902 in 1980 and was at its lowest, 226, in 2015.
The series is highly variable year to year, so single readings are best treated with caution.
Diphtheria - number of reported cases, gaps filled in Western Pacific (WHO region), year by year
| Year | Value | Change |
|---|---|---|
| 1980 | 18,902 | — |
| 1981 | 16,875 | -10.7% |
| 1982 | 17,236 | +2.1% |
| 1983 | 14,511 | -15.8% |
| 1984 | 10,057 | -30.7% |
| 1985 | 7,071 | -29.7% |
| 1986 | 5,734 | -18.9% |
| 1987 | 4,312 | -24.8% |
| 1988 | 4,681 | +8.6% |
| 1989 | 3,657 | -21.9% |
| 1990 | 4,262 | +16.5% |
| 1991 | 3,186 | -25.2% |
| 1992 | 1,569 | -50.8% |
| 1993 | 776 | -50.5% |
| 1994 | 877 | +13.0% |
| 1995 | 1,151 | +31.2% |
| 1996 | 1,073 | -6.8% |
| 1997 | 4,760 | +343.6% |
| 1998 | 977 | -79.5% |
| 1999 | 298 | -69.5% |
| 2000 | 267 | -10.4% |
| 2001 | 577 | +116.1% |
| 2002 | 308 | -46.6% |
| 2003 | 1,138 | +269.5% |
| 2004 | 355 | -68.8% |
| 2005 | 1,258 | +254.4% |
| 2006 | 507 | -59.7% |
| 2007 | 263 | -48.1% |
| 2008 | 314 | +19.4% |
| 2009 | 318 | +1.3% |
| 2010 | 585 | +84.0% |
| 2011 | 843 | +44.1% |
| 2012 | 1,334 | +58.2% |
| 2013 | 817 | -38.8% |
| 2014 | 452 | -44.7% |
| 2015 | 226 | -50.0% |
| 2016 | 440 | +94.7% |
| 2017 | 1,095 | +148.9% |
| 2018 | 1,252 | +14.3% |
| 2019 | 866 | -30.8% |
| 2020 | 597 | -31.1% |
| 2021 | 290 | -51.4% |
| 2022 | 672 | +131.7% |
| 2023 | 1,336 | +98.8% |
| 2024 | 1,209 | -9.5% |
| 2025 | 428 | -64.6% |
Biggest year-on-year movements
Years where Diphtheria - number of reported cases, gaps filled in Western Pacific (WHO region) 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 |
|---|---|---|---|
| 1997 | +343.6% | 1,073 | 4,760 |
Averages by decade
| Decade | Average | Lowest | Highest | Years |
|---|---|---|---|---|
| 1980s | 10,304 | 3,657 | 18,902 | 10 |
| 1990s | 1,893 | 298 | 4,760 | 10 |
| 2000s | 530.5 | 263 | 1,258 | 10 |
| 2010s | 791 | 226 | 1,334 | 10 |
| 2020s | 755.33 | 290 | 1,336 | 6 |
Countries ranked near Western Pacific (WHO region)
More health data for Western Pacific (WHO region)
- Total tetanus - number of reported cases, gaps filled 5,464 (2025)
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- Neonatal tetanus - number of reported cases, gaps filled 214 (2025)
- Pertussis - number of reported cases, gaps filled 159,013 (2025)
- Number of neonatal deaths, annual growth rate -4.28 % change on previous year (2024)
- Number of infant deaths, annual growth rate -4.75 % change on previous year (2024)
- Number of under-five deaths, annual growth rate -5.73 % change on previous year (2024)
- Measles - number of reported cases, annual growth rate 228.55 % change on previous year (2025)
- Pertussis - number of reported cases, annual growth rate -73.21 % change on previous year (2025)
- Total tetanus - number of reported cases, annual growth rate 10.81 % change on previous year (2025)
Frequently asked questions
- What is diphtheria - number of reported cases, gaps filled in Western Pacific (WHO region)?
- Diphtheria - number of reported cases, gaps filled in Western Pacific (WHO region) was 428 in 2025, according to Statizoid (derived).
- What is the highest diphtheria - number of reported cases, gaps filled recorded in Western Pacific (WHO region)?
- The highest recorded value was 18,902 in 1980.
- What is the lowest diphtheria - number of reported cases, gaps filled recorded in Western Pacific (WHO region)?
- The lowest recorded value was 226 in 2015.
- How does Western Pacific (WHO region) rank for diphtheria - number of reported cases, gaps filled?
- Western Pacific (WHO region) ranks 8th out of 11 groups with data for 2025.
- Is diphtheria - number of reported cases, gaps filled rising or falling in Western Pacific (WHO region)?
- Over the last ten years it is up 89.4%. The long-run trend across the full record is volatile.
- Where does this Western Pacific (WHO region) data come from?
- The figures come from Statizoid (derived), published as part of Diphtheria - number of reported cases, gaps filled. Statizoid updates them automatically from the source API.
Download this data
CSV · JSON — 46 observations, free to reuse under Derived by Statizoid from the sources named on the page.
How this figure is calculated
Diphtheria - number of reported cases with 613 missing years estimated by linear interpolation between the nearest real observations. Only gaps of 4 years or fewer are filled, and never beyond the first or last actual measurement — these are filled holes, not forecasts.
Computed from
- Diphtheria - number of reported cases World Health Organization, Global Health Observatory
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
Diphtheria - number of reported cases with 613 missing years estimated by linear interpolation between the nearest real observations. Only gaps of 4 years or fewer are filled, and never beyond the first or last actual measurement — these are filled holes, not forecasts.