Reported legionellosis surveillance for South Korea (KOR) — ▲ Rising · 2025 — latest record 2026-11-04
As of 26 October 2026, South Korea has reported 723 legionellosis cases in 2026, compiled from figures published by South Korea KDCA and 1 other reporting authority. The full year 2025 closed at 640 cases. 2025 closed 42% above 2024, which is why the trend reads “Rising”.
Of the 7 countries reporting legionellosis to ENCLAI in 2026, South Korea accounts for 11.1% of reported cases and ranks 2 by case count.
ENCLAI has logged 177 surveillance records for legionellosis in South Korea in 2026, with the most detailed reporting in Jul 2026 (135 records). 8 of those arrived in the last 30 days; the case counts run to 2026-10-26. 2 distinct surveillance sources reported this pair in 2026.
Reporting authorities for these counts: South Korea KDCA · Korea Disease Control and Prevention Agency — Province-Level Surveillance
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 | not reported | — |
| 2024 | 452 | 39.8% |
| 2025 | 640 | 6.7% |
| 2026 (year to date) | 723 | 11.1% |
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 legionellosis 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 |
|---|---|---|
| Mar 2026 | 6 | 1 |
| Apr 2026 | 4 | 1 |
| May 2026 | 4 | 1 |
| Jun 2026 | 5 | 1 |
| Jul 2026 | 135 | 1 |
| Aug 2026 | 4 | 1 |
| Sep 2026 | 5 | 1 |
| Oct 2026 | 11 | 2 |
| Nov 2026 | 3 | 2 |
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. 8 records were logged in the last 30 days.
Areas within South Korea with the most legionellosis records this year:
| Area | Records |
|---|---|
| Busan | 1 |
| Daegu | 1 |
| Gyeonggi-do | 1 |
| Gyeongsangbuk-do | 1 |
| Gyeongsangnam-do | 1 |
| Country | 2026 cases | Trend |
|---|---|---|
| United States | 4,988 | ▲ Rising · 2025 |
| Australia | 646 | |
| New Zealand | 64 | ≈ Stable · 2025 |
| Lithuania | 42 | ▲ Rising · 2025 |
| Singapore | 19 |
| Disease | 2026 cases | Trend |
|---|---|---|
| Carbapenem-resistant organism infection | 46,917 | ≈ Stable · 2025 |
| Varicella | 32,970 | ≈ Stable · 2025 |
| Scarlet fever | 11,108 | ▲ Rising · 2025 |
| Mumps | 5,424 | ≈ Stable · 2025 |
| Hepatitis C | 4,933 | ≈ 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.
