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Global Dengue
Key points .
- Dengue is a year-round risk in many parts of the world, with outbreaks commonly occurring every 2–5 years.
- Some countries are reporting increased numbers of cases of the disease.
- Dengue is spread by mosquito bites.
- Travelers to risk areas should prevent mosquito bites by using an EPA-registered insect repellent , wearing long-sleeved shirts and long pants when outdoors, and sleeping in an air-conditioned room or room with window screens.
![cdc travel mexico Countries reporting higher-than-usual numbers of dengue cases](https://wwwnc.cdc.gov/travel/images/global-dengue.png)
Dengue is a disease caused by a virus spread through mosquito bites. The disease can take up to 2 weeks to develop with illness generally lasting less than a week.
Symptoms from dengue include fever, headache, nausea, vomiting, rash, muscle and joint pain, and minor bleeding.
Dengue can become severe within a few hours. Severe dengue is a medical emergency, usually requiring hospitalization.
In severe cases, health effects can include hemorrhage (uncontrolled bleeding), shock (seriously low blood pressure), organ failure, and death.
What is the current situation?
The countries listed below are reporting higher than usual numbers of cases, or CDC has identified a higher-than-expected number of dengue cases among U.S. travelers returning from those countries. Travelers visiting these countries may be at increased risk:
- Afghanistan
- Burkina Faso
- El Salvador
- French Guiana
- French Polynesia
Countries are added to this list based on publicly available data. Not all countries with dengue transmission are on this list. Travelers should practice prevention measures for all areas with a risk of dengue .
Traveler Information
- CDC dengue homepage
- Dengue Around the World
Clinician Information
- Dengue in CDC Yellow Book
- Dengue information for health care professionals
*Based on ArboNET modeling which considers historical data about dengue cases among travelers to each country, from 2010 to present. It calculates the expected number of travelers with dengue returning from each country monthly to account for dengue seasonality. If the number of dengue cases in travelers is higher than expected (using an 80% threshold) for that month, dengue transmission is considered ‘high’. ArboNET is the national arboviral surveillance system that maintains data on arboviral infections among humans, presumptive viremic blood doners, veterinary disease cases, mosquitoes, dead birds, and sentinel animals. ArboNET is managed by CDC and state health departments and relies on the clinical diagnoses, testing, and reporting of arboviral diseases to public health authorities.
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At a glance
CDC collaborates with health officials in Mexico to address infectious diseases, enhance surveillance, and respond to outbreaks. The CDC Mexico Country Office coordinates the Binational Technical Working Group and collaborates closely with the Mexico Ministry of Health, focusing on a wide-range of public health priorities, to improve U.S.-Mexico public health. These include initiatives related to tuberculosis, laboratory capacity, antimicrobial resistance, influenza surveillance, and migrant health.
![cdc travel mexico Zocalo Square and Metropolitan Cathedral of Mexico City.](https://www.cdc.gov/migration-border-health/media/images/DGMHWorkinMexicoZocaloSquareandMetropolitanCathedralofMexicoCity.jpg)
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About the CDC Mexico Country Office
CDC collaborates with Mexico health officials to prevent the spread of disease among binational communities and mobile populations that travel between both countries. The CDC Mexico Country Office (CDC Mexico) was established in 2000 as part of CDC Division of Global Migration Health (DGMH) Southern Border Health and Migration Branch (SBHMB).
As new health challenges emerge, CDC Mexico provides technical support for
- Investigating and controlling binational and international infectious disease outbreaks
- Enhancing binational surveillance, laboratory capacity, and illness response
- Communicating with U.S. and foreign government officials on policies critical to binational health
CDC's Impact in Mexico
CDC supported the Mexican Secretariat of Health with $3.168 million through a cooperative agreement with the U.S.-Mexico Foundation for Science in 2020 to 2022. Funds were used to conduct the first nationally representative COVID-19 serosurvey (study that measures proportion of persons in a community that have antibodies to a given germ), epidemiological surveillance, risk communication, and population mobility analysis in and throughout Mexico.
Binational Technical Working Group (BTWG)
The BTWG was established in 2012 to address mutual public health concerns because of the inter-connectedness of people who cross the U.S.-Mexico border or live in the border region A .
The BTWG assesses and advises on binational public health issues and assists with developing binational public health initiatives or policies for the two countries. This work is possible by collaborating with public health officials from the U.S. and Mexico border states, CDC, and Mexico's Directorate of Epidemiology and the National Center for Preventive Programs and Disease Control.
Led by CDC Mexico, the group of subject matter experts meets each month to exchange information about infectious diseases in the border region, research initiatives, epidemiologic trends, and tools that can be implemented binationally.
Recent BTWG meeting topics included
Disease surveillance.
CDC Mexico collaborates with the Binational Border Infectious Disease Surveillance (BIDS) program to improve binational disease prevention.
BIDS officers in U.S. border states work with partners in Mexican sister-cities and states to share disease information and collaborate on binational outbreaks. For example, the California BIDS program was instrumental in exchanging information with Baja California on a group of a rare antibiotic resistant infections associated with surgery conducted at a healthcare facility in Tijuana, Baja California, Mexico.
CDC Mexico also supported a pilot of an antimicrobial resistance surveillance system and standardized treatment guidance for primary care settings in Mexico. Additionally, CDC Mexico supported Mexico in creating a national vaccine registry.
Tuberculosis (TB)
TB remains a leading cause of infectious disease deaths worldwide. CDC Mexico provides technical support to fight TB in Mexico and works with the CureTB program to ensure mobile populations get treatment or preventive care for TB. CDC Mexico supports the National Action Program for the Prevention and Control of Tuberculosis by studying the use of TB blood tests (also called interferon-gamma release assays or IGRAs) to diagnose latent TB infection in people with high-risk for developing TB (e.g., those with HIV, diabetes mellitus, and children under 5 years of age) and have had close contact with someone with infectious TB.
CDC has several international laboratory projects in Mexico, including two in Sonora and Baja California. These projects aim to enhance disease control programs’ capacity to identify groups of people at risk for developing drug-sensitive TB (DS TB) or drug-resistant TB (DR TB) that would most benefit from a rapid molecular TB test. The goal is to detect DS TB and DR TB in the highest number of people using the least resources. As part of the effort in Sonora, CDC is also studying rapid molecular testing of new types of samples for TB testing in children under 10 years of age. The stool and nasopharyngeal aspirate (suction from the back of the nose) samples are easier and faster to collect than standard samples and may reduce the need for hospitalization.
CDC global and domestic teams collaborated to enhance the national electronic surveillance system in Mexico, known as Plataforma. The update allows a more accurate reporting of DR TB cases.
![cdc travel mexico Laboratory scientists looking at lab specimen samples](https://www.cdc.gov/migration-border-health/media/images/LabScientists_MexicoPage.jpg)
CDC and the Mexico Health Secretariat have a decades-long influenza surveillance collaboration. The year-round surveillance allows for early detection and identification of seasonal influenza viruses and new influenza A viruses that may be able to cause a pandemic . The collaboration is also using new technology to improve existing reporting tools.
Migrant Health
Mexican-born people are the largest immigrant group living in the United States.
CDC Mexico collaborates with multiple partners to enhance the availability of public health surveillance for Mexican-origin populations in the United States and to assess health disparities .
CDC Mexico also works with partners to describe infectious disease risks, barriers in access to health care, and preventive services for migrant populations transiting through and within Mexico. The aim is to provide local, regional, and national public health officials timely and accurate data to inform health strategies.
- The U.S.-Mexico border region is made up of 44 counties across four U.S. states and 80 border municipios across six Mexican states within 100 km (62 miles) of the 2000-mile-long international border line.
CDC works with partners to detect and prevent the spread of infectious diseases and other public health threats related to border health and migration.
For Everyone
Public health.
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