Dengue fever alert: As the tropical disease spreads across Europe, we reveal the early-warning signs of killer virus you should NEVER ignore

Dengue is a potentially deadly virus passed to people by infected mosquitoes and was historically known as ‘breakbone fever’ in the 1700s because of the severe pain it can cause. Dengue is a potentially deadly virus passed to people by infected mosquitoes and was historically known as ‘breakbone fever’ in the 1700s because of the severe pain it can cause.