CDC Issues Dengue Fever Warning for 15+ Countries During Spring Break Travel Season

The U.S. Centers for Disease Control and Prevention (CDC) has issued a “Level 1: Practice Usual Precautions” alert for dengue fever in more than 15 countries, coinciding with the peak spring break travel period. The warning, published Monday, includes popular tourist destinations such as the Maldives and the Cook Islands in New Zealand.

“Dengue is a year-round risk in many parts of the world, with outbreaks commonly occurring every two to five years,” the CDC stated in its advisory. “Some countries are reporting increased numbers of cases of the disease.”

Dengue fever, a virus transmitted through the bite of infected mosquitoes, typically proliferates in tropical and subtropical regions across the Americas, Africa, the Middle East, Asia, the Pacific Islands, and many Caribbean destinations—all popular vacation spots for American travelers.

The timing of this advisory is particularly significant as thousands of Americans embark on spring break vacations to tropical destinations, many unaware of the increased health risks they may face from mosquito-borne diseases.

Dr. Mark Fischer, regional medical director of International SOS, a leading medical and security services company, described the disease’s progression: “It’s typically a more mild illness, but can be severe, causing headaches, joint pain, fever, abdominal pain and even death.”

According to health experts, most infected individuals experience symptoms within two weeks of being bitten. Common indicators include eye, muscle, joint, and bone pain, nausea, vomiting, and rashes. While most people recover after two to seven days, approximately one in 20 develop severe dengue, which can lead to more dangerous symptoms including bleeding from the nose or gums and vomiting blood.

Currently, there is no specific medication to treat dengue infection. Medical professionals recommend rest, acetaminophen for pain and fever management, proper hydration, and prompt medical consultation. For prevention, the CDC has approved a vaccine for U.S. children between 9 and 16 years of age who have previously tested positive for dengue and live in endemic areas.

Preventive measures remain the most effective strategy against infection. Travelers are advised to take precautions against mosquito bites for three weeks after returning from dengue-endemic areas and to seek medical attention if symptoms develop within two weeks of return.

Fischer emphasized practical protection measures: “It’s important to wear insect repellent that contains DEET, picaridin or lemon and eucalyptus oil, as these ingredients are the most effective at repelling mosquitoes and other insects. Those who live in areas with mosquito populations should try to wear long-sleeved shirts and long pants, especially at dusk and in the evening, when mosquitoes are most active.”

Environmental management plays a crucial role in dengue prevention as well. Experts recommend eliminating standing water where mosquitoes breed, including buckets, water-catching plants like bromeliads, small containers, planters, rain barrels, and even cups left outside.

Additional protective measures include installing screens on windows and doors to prevent mosquitoes from entering living spaces. “If you live in an area that has a high level of mosquito-borne diseases, you should use mosquito nets when sleeping and eliminate any standing water in and around the home, since still bodies of water are breeding grounds for the insects,” Fischer added.

This warning follows a recent CDC advisory about polio risk in over 30 countries, highlighting the importance of health awareness for international travelers as global mobility returns to pre-pandemic levels.