Mega Doctor News KEY POINTS What it is Dengue is a viral disease caused by any of the four related viruses: dengue virus 1, 2, 3, and 4.  Types There are four different but closely-related dengue virus types: dengue-1, dengue-2, dengue-3, and dengue-4. Symptoms The most common dengue symptom is fever with: Keep Reading: Symptoms … Continue reading Dengue: What You Need to Know