Dengue is transmitted by mosquitoes, so it's associated with areas where they are common. She always uses mosquito repellent to lower the risk of getting dengue.
Pro Tip 2/3
Tropical Regions
Dengue is more prevalent in tropical places, so it's often discussed in travel and health advisories. The travel clinic advised me to get a dengue vaccine before my trip to the tropics.
Pro Tip 3/3
Health Condition
Dengue refers to a serious illness, and using it shows concern for health issues in affected regions. The health organization is raising dengue awareness to prevent outbreaks.