An outbreak of chikungunya in Seychelles has led the Centers for Disease Control and Prevention (CDC) in the United States to issue a Level 2 travel alert, recommending enhanced preventive measures for those planning to visit this Indian Ocean archipelago and other regions with active transmission.
Chikungunya is a viral disease transmitted by the Aedes aegypti mosquito, the same vector responsible for dengue and Zika. The infection can cause sudden high fever, intense joint pain, muscle pain, headache, inflammation, and rashes.
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Resurgence of the chikungunya virus in America and other regions
The Pan American Health Organization (PAHO) reported that there is currently active circulation of the chikungunya virus in countries of the Americas, after several years of low transmission.
“Chikungunya spread in the Americas in 2013 and, after years of low transmission, we are observing a resurgence, especially in the intertropical zone where the Aedes aegypti mosquito is present”, said the PAHO.
Since the end of 2025, health authorities have detected a sustained increase in infections, as well as the reappearance of local transmission in areas where no cases had been reported for years. High temperatures and favorable environmental conditions have contributed to the proliferation of the transmitting mosquito.
What does the CDC Level 2 alert mean?
The Level 2 health advisory does not imply the cancelation of trips, but it does recommend adopting enhanced protective measures against mosquito bites during stays in areas with active outbreaks.
Recommendations for the chikungunya outbreak
Health authorities suggest:
- Use insect repellent consistently.
- Wear long-sleeved clothing and long pants.
- Stay in places with air conditioning or mosquito nets.
- Avoid water accumulations where mosquitoes breed.
It is also recommended to evaluate the chikungunya vaccine before traveling to regions with active transmission. The decision should be made after a personalized medical evaluation, considering age, health status, trip duration, and planned activities.
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Recommendations for pregnant women
In the case of pregnant women, authorities advise carefully assessing the need to travel to areas with active outbreaks, especially in the later stages of pregnancy.
There is a risk of virus transmission from mother to child during late pregnancy or at the time of birth, which can cause serious complications in newborns. In general terms, vaccination is usually postponed until after childbirth, although each case should be evaluated with a healthcare professional.
What are the symptoms of chikungunya?
According to the CDC, medical attention should be sought if during the trip or after returning the following occur:
- High fever
- Intense joint pain
- Muscle pain
- Headache
- Swelling in the joints
- Rash
The chikungunya outbreak in Seychelles and the resurgence of cases in America underscore the importance of maintaining preventive measures, especially for international travelers.
