SE Asia 06 Nov 2026 · Dr Natalya Mathur
ENCLAI ID ENCLAI-2026-0000775-5 · Cite

Dengue in Vietnam: 11,698 cases in 90 days, 1,605 in the last 30

ENCLAI SURVEILLANCE BRIEFING · 06 NOVEMBER 2026Dengue in Vietnam: 11,698 cases in 90days, 1,605 in the last 30Dengue fever · Vietnam · reported cases1,605reported cases in the 30 days to 6November▲ 10% more than the 30 days before (1,462)1,462The 30 daysbefore11,69890 days to 6November131,2022026 so far2 of 42rank, reportingcountriesThree 30-day windows1,46230 days before1,605Last 30 daysLargest counts, last 90 daysBrazil40,092Malaysia24,215Sri Lanka13,728Vietnam11,698Mexico4,450Panama3,19023 countries with a reported count in this windowWhat this briefing shows1Reported cases rose from 1,462 to 1,605 between the two latest30-day windows, 10% more.2Vietnam accounts for 13.6% of the dengue cases reported to ENCLAIworldwide in 2026 and ranks 2 of 42 reporting countries.Read with care: reports to official surveillance, not people and not a rate. A change between30-day windows can come from reporting timing as much as from transmission.Source: official surveillance reports compiled by ENCLAI · data as of 2026-11-06 ·enclai.net/newsVerify every figure against the source data before use; ENCLAI does not guarantee accuracy orcompleteness.
  1. Reported cases rose from 1,462 to 1,605 between the two latest 30-day windows, 10% more.
  2. Vietnam accounts for 13.6% of the dengue cases reported to ENCLAI worldwide in 2026 and ranks 2 of 42 reporting countries.
Customise it in Visual Studio
Largest included reported counts (6 of 23 countries) · 2026-08-09 through 2026-11-06 · source-record dates; coverage varies
Brazil40,092
Malaysia24,215
Sri Lanka13,728
Vietnam11,698
Mexico4,450
Panama3,190
Dengue fever — Vietnam · reported surveillance count · 2026-08-09 through 2026-11-06 · inclusive source-record dates
Dengue fever — Vietnam · reported surveillance count · 2026-10-08 through 2026-11-06 · inclusive source-record dates
Dengue fever — Vietnam · reported surveillance count · 2026-09-08 through 2026-10-07 · inclusive source-record dates
Dengue fever — Vietnam · reported surveillance count · 2025-10-08 through 2025-11-06 · inclusive source-record dates
Dengue fever · combined reported surveillance count · 2026-08-09 through 2026-11-06 · inclusive source-record dates
Dengue fever · weekly reported-count series · Weeks starting 2026-07-27 through 2026-10-12
Largest included reported counts (6 of 23 countries) · 2026-08-09 through 2026-11-06 · source-record dates; coverage varies

The full briefing

Full 2026 picture: Dengue fever in Vietnam — reported cases by year, monthly records and every briefing for this pair.

Vietnam reported 11,698 dengue cases in the 90 days to 6 November. 1,605 of them came in the 30 days to 6 November, against 1,462 in the 30 days before.

Why it matters

Vietnam accounts for 13.6% of the dengue cases reported to ENCLAI worldwide so far in 2026. It ranks 2 of 42 reporting countries.

The numbers

PeriodReported cases
Last 30 days (to 6 November)1,605
The 30 days before that1,462
90 days to 6 November11,698
2026 so far (ENCLAI export)131,202
The card shows dengue in Vietnam. It compares the last 30 days with the 30 days before, as reported to ENCLAI.
The card shows dengue in Vietnam. It compares the last 30 days with the 30 days before, as reported to ENCLAI.

What the source says

These figures come from official surveillance reports. They count reports, not people. They are not an incidence rate, the rate of new cases in a population. They do not cover the whole population. The reporting periods do not match these dates exactly. Some reports are incomplete or still in progress. Some run past the window. Some reports do not say which date they use: symptom onset, notification, or confirmation.

Caveats

  • A change between two 30-day windows can come from reporting timing as much as from transmission. The source does not say which.

Where to learn more

Dengue fever worldwide · Vietnam: all diseases · How to read these counts

Retained reporting context

Included reporting countries

Dengue fever

100,151

combined reported surveillance count

2026-08-09 through 2026-11-06 · inclusive source-record dates

For Dengue fever, the combined reported surveillance count across the 23 countries with positive reported counts in this selection is 100,151. The selection uses source-record dates 2026-08-09 through 2026-11-06, inclusive. This covers only these reporting countries; source periods and completeness vary.

Exact included country membership
CountryReported countSource-record dates
American Samoa362026-08-09 through 2026-11-06
Australia2712026-08-09 through 2026-11-06
Bulgaria22026-08-09 through 2026-11-06
Brazil40,0922026-08-09 through 2026-11-06
Germany532026-08-09 through 2026-11-06
Dominican Republic2072026-08-09 through 2026-11-06
Spain372026-08-09 through 2026-11-06
Finland22026-08-09 through 2026-11-06
Hong Kong42026-08-09 through 2026-11-06
South Korea502026-08-09 through 2026-11-06
Sri Lanka13,7282026-08-09 through 2026-11-06
Mexico4,4502026-08-09 through 2026-11-06
Mali1822026-08-09 through 2026-11-06
Martinique72026-08-09 through 2026-11-06
Malaysia24,2152026-08-09 through 2026-11-06
Panama3,1902026-08-09 through 2026-11-06
Puerto Rico1102026-08-09 through 2026-11-06
Reunion132026-08-09 through 2026-11-06
Singapore7772026-08-09 through 2026-11-06
El Salvador262026-08-09 through 2026-11-06
Taiwan112026-08-09 through 2026-11-06
United States9902026-08-09 through 2026-11-06
Vietnam11,6982026-08-09 through 2026-11-06

Snapshot 2026-11-06

Weekly reporting history

Dengue fever

weekly reported-count series

Weeks starting 2026-07-27 through 2026-10-12

A retained retrospective weekly reported-count series across included reporting countries. Country membership and reporting completeness can vary by week. Missing weeks remain gaps. This is a separate report-series measure; it does not establish exact incidence or laboratory confirmation. Exact country membership could not be reconciled to the current primary snapshot.

Retained weekly report series
WeekReported count
2026-07-27 through 2026-08-0221641
2026-08-03 through 2026-08-0922186
2026-08-10 through 2026-08-1623242
2026-08-17 through 2026-08-2320225
2026-08-24 through 2026-08-3025112
2026-08-31 through 2026-09-0627822
2026-09-07 through 2026-09-1320867
2026-09-14 through 2026-09-2020635
2026-09-21 through 2026-09-2722913
2026-09-28 through 2026-10-0424177
2026-10-05 through 2026-10-1121387
2026-10-12 through 2026-10-1810803

Snapshot 2026-11-06

Sources and limitations

  • Window. Each quantity keeps its recorded source-selection dates and coverage notes. Dated batches and weekly or genomic observations retain their separate measures. Publication or capture dates do not establish case onset, equal cohorts or period completeness.
  • Denominator. The retained counts do not establish complete populations, equal reporting cohorts or incidence rates. Source period bounds and definitions can differ.
  • Case definition. Case definitions are set nationally and change over time. Counts for the same disease in different countries may not be counting the same thing.
  • Revisions. Agencies restate figures. Values here are as reported at the time of publication; see the update history below.

ENCLAI counts reflect verified records available from reporting sources for the stated window. They are not estimates of total incidence and should not be interpreted as medical advice. Full methodology: the dataset.

Review and corrections

Share this briefing
ENCLAI tracks outbreaks like this live, from official sources worldwide. Start 7-day free trial  ·  Request a demo →

Follow ENCLAI News

Get new briefings in your news reader. No ENCLAI account needed.

Follow in Feedly Open RSS feed

The daily disease brief

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.

Double opt-in — we send a confirmation link and nothing else until you click it. One-click unsubscribe on every email. See our privacy notice.