# Cholera & mosquito-borne — WATCH (worsening)
id cholera-dengue · Global Health · horizon acute · checked 2026-11-01T11:52Z · at this level since 2026-10-31T11:26Z · stale after 2026-11-02T23:52Z
Assessed by an AI model (Anthropic Claude) against published rubrics; not a forecast or advice · CC BY 4.0 · https://canary.danleech.com/s/cholera-dengue

Value: Cholera in DRC; record dengue seasons
Rated on: Record-level seasons, or local transmission in countries where the disease was not established (including Europe).

Cholera spikes in DR Congo; record dengue in Florida and Bangladesh

Why it's at this level: UN agencies report cholera cases spiking in DR Congo alongside the Ebola response (October), and the Central African Republic has declared a cholera outbreak. Florida's dengue outbreak is the largest in a US state in decades, and Bangladesh's dengue death toll is still rising. No WHO grade 3 declaration as of 1 Nov.

What this means for you: Use mosquito protection when travelling to dengue-affected regions; check TravelHealthPro before travel.

Why it matters: Climate-sensitive diseases — cholera, dengue, chikungunya, Oropouche, West Nile and yellow fever — are hitting record levels and reaching new regions.
What moves it: Conflict, floods, heat, El Niño, water and sanitation, mosquito range expansion.

Rubric — Alert: Large outbreaks with high mortality in conflict zones, or a WHO grade 3 emergency. | Watch: Record-level seasons, or local transmission in countries where the disease was not established (including Europe). | Normal: Seasonal levels.

Sources:
- UN News — Cholera spikes in DR Congo (2026-10-20) https://news.un.org/en/story/2026/10/1168595
- Medical Xpress — Florida dengue outbreak largest in a state (2026-10-20) https://medicalxpress.com/news/2026-10-florida-dengue-outbreak-largest-state.html
- EMPHNET — Central African Republic declares cholera outbreak (2026-10-01) https://epinews.emphnet.net/en/news/central-african-republic-declares-cholera-outbreak-after-24-deaths