What is dengue?

Dengue is a viral infection transmitted by female mosquitoes and is common in warm, tropical climates. The symptoms range from extremely mild to severe flu-like symptoms, along with muscle and joint pain, nausea and vomiting.

In some cases, people develop severe dengue, which can lead to complications associated with severe bleeding and organ impairment. Severe dengue can occasionally be fatal.

There is no treatment for the infection itself, but the symptoms can be managed.

What is Chikungunya?

Chikungunya is a viral disease transmitted by infected mosquitoes. It causes fever and severe, debilitating joint pain. Infection may also cause muscle pain, headaches, nausea, fatigue and rashes.

There is no current cure for Chikungunya. Treatment is focused on relieving the symptoms using anti-fever and pain medication.

The disease mostly occurs in Africa, Asia and India.


50%* of the world's population is now at risk of dengue 4.2 million dengue cases were reported globally in 2019


60+ countries have reported outbreaks across Asia, Africa, Europe and the Americas 8 million* cases were reported globally between 2004 and 2017


Further information



Source: WHO data 2018