CDC Issues Travel Warning for Chikungunya Virus Outbreaks
Health authorities in the United States have issued a critical travel advisory urging precautions against mosquito bites for travellers planning visits to the Seychelles islands or Bolivia. This warning comes amid a significant outbreak of the chikungunya virus, a mosquito-borne illness that has prompted global concern.
The Centers for Disease Control and Prevention (CDC) has elevated its advisory to "level 2" for the Seychelles, Bolivia, and Suriname, recommending that prospective holidaymakers consider vaccination before embarking on their journeys. According to the Pan American Health Organisation (PAHO), chikungunya was responsible for 186 related deaths worldwide in recent reports.
Understanding Chikungunya: Transmission and Global Spread
Chikungunya virus disease is a viral infection transmitted to humans through the bite of an infected mosquito. It is prevalent across tropical and sub-tropical regions and cannot be spread directly from person to person. Cases have been documented in the Americas, Africa, Asia, and Europe, with Brazil reporting the highest number of infections in 2025, followed by Bolivia, Argentina, and Peru.
The European Centre for Disease Prevention and Control (ECDC) has linked the transmission of dengue and chikungunya viruses in mainland Europe to travellers who inadvertently carried infected mosquitoes from affected regions. In total, PAHO reported approximately 502,264 chikungunya cases and 186 related deaths across 41 countries or territories last year, highlighting the virus's widespread impact.
Symptoms and Health Risks of Chikungunya
The term "chikungunya" originates from the Makonde people in Tanzania, where the disease was first identified in the 1950s. It translates to "that which bends up," referring to the contorted posture of infected individuals suffering from severe joint pain. Symptoms typically include an abrupt onset of fever, joint swelling, muscle pain, headaches, nausea, fatigue, and rashes.
Joint pain can be debilitating, lasting from a few days to weeks, months, or even years in some cases. While most people recover fully, the infection can lead to severe complications, particularly in vulnerable populations. Newborns and older adults with underlying medical conditions are at higher risk of severe disease, which may involve eye, heart, or neurological issues. Pregnant individuals are advised to reconsider travel to affected areas due to risks of severe illness in newborns.
Vaccine Availability and Prevention Strategies in the UK
In the United Kingdom, two chikungunya vaccines are available, both containing a weakened form of the virus that cannot multiply. These vaccines work by training the immune system to recognise and attack the virus, providing long-lasting protection. They are prescription-only and recommended for individuals planning to travel to regions where the virus is present, with one vaccine approved for ages 18 to 59 and another for those over 12.
Hilary Kirkbride, head of travel health at the UK Health Security Agency (UKHSA), emphasises the importance of preventive measures. "Simple steps, such as using insect repellent, covering exposed skin, and sleeping under insecticide-treated bed nets, can effectively reduce the risk," she says. "Before you travel, check the TravelHealthPro website for the latest health advice on your destination. A chikungunya vaccine may also be considered for those travelling to higher-risk regions."
Expert Advice from Travel Medical Specialists
Dr Richard Dawood, a travel medical specialist at Fleet Street Clinic, provides insights into the vaccination's role in prevention. "This is a new situation for us. Until a very short time ago, we had no vaccine, and the only approach to prevention was to make careful use of insect repellents and insect precautions," he explains. "So now we've got this extra tool in the armoury, and because the vaccine gives long-lasting protection, it’s something that could be considered if you are planning to travel over a period of time."
Dr Dawood notes that while the vaccine is relatively expensive, it may be worthwhile for frequent travellers to affected areas. He advises holidaymakers to conduct thorough research and seek personalised travel health advice. "If there's an actual outbreak at your destination, then I would say no hesitation, definitely have the vaccine," he recommends. "Taking a bit of time and getting some really focused travel health advice for your particular trip is very worthwhile because it can save you from getting a vaccine that you don't need or that may not be sensible for you, and it can help prioritise the really important things for your trip."
Travel clinics can also offer guidance on insect bite precautions and other risk-reduction strategies, ensuring travellers are well-prepared for their journeys.
