Reported diphtheria surveillance for New Zealand (NZL) — ▲ Rising · 2025 — latest record 2026-10-13
No diphtheria case count has been reported for New Zealand so far in 2026. The full year 2025 closed at 4 cases. 2025 closed 60% above the 2023–2024 average, which is why the trend reads “Rising”.
ENCLAI has logged 12 surveillance records for diphtheria in New Zealand in 2026, with the most detailed reporting in May 2026 (8 records). 4 of those arrived in the last 30 days. 1 distinct surveillance sources reported this pair in 2026.
One email a day: what changed in official disease reporting worldwide, with the source named for every number. Reported facts only — no forecasts and no interpretation.
| Year | Reported cases | Share of worldwide reports |
|---|---|---|
| 2023 | 3 | 0.2% |
| 2024 | 2 | 0.2% |
| 2025 | 4 | 0.4% |
| 2026 (year to date) | not reported | — |
Reporting bounds and case definitions vary; historical baselines are a separate comparison measure. Worldwide share compares this country's reported figure with the sum of all countries reporting diphtheria to ENCLAI for that year. "Incomplete year" means our sources cover less than ten months of that year, so no full-year figure is shown; "outbreak total to date" is a running total since an outbreak began, not a count for one year.
| Month | Records | Reporting sources |
|---|---|---|
| May 2026 | 8 | 1 |
| Oct 2026 | 4 | 1 |
A record is one dated surveillance publication or one row of an official table; a month with many records is a month with detailed reporting, not necessarily more cases. 4 records were logged in the last 30 days.
Areas within New Zealand with the most diphtheria records this year:
| Area | Records |
|---|---|
| Auckland | 4 |
| Canterbury | 4 |
| Southland | 1 |
| Country | 2026 cases | Trend |
|---|---|---|
| Nigeria | 12,491 | |
| Australia | 630 | ▼ Declining · 2025 |
| Niger | 313 | |
| Senegal | 161 (outbreak total to date) | |
| Guinea | 148 |
| Disease | 2026 cases | Trend |
|---|---|---|
| COVID-19 | 6,909 | ▼ Declining · 2025 |
| Campylobacteriosis | 2,271 | ≈ Stable · 2025 |
| Whooping cough (pertussis) | 909 | ▲ Rising · 2025 |
| Non-typhoidal salmonellosis | 493 | ▲ Rising · 2025 |
| Enterohaemorrhagic E. coli (EHEC) infection | 469 | ≈ Stable · 2025 |
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One email a day: what changed in official disease reporting worldwide, with the source named for every number. Reported facts only — no forecasts and no interpretation.
