Ongoing · Global mosquito-borne outbreak

Dengue 2026

Global · WHO, PAHO & US CDC

About dengue

Cause
Dengue virus (four types), a flavivirus
How it spreads
Bite of infected Aedes mosquitoes, which bite by day; not person to person
Worst outcome
Severe dengue: bleeding, shock and organ failure, a medical emergency
Prevention
Avoid mosquito bites and remove standing water; a vaccine exists in some countries

Sources: PAHO Dengue · CDC Dengue · WHO Dengue