The UK Health Security Agency (UKHSA) has issued an alert to holidaymakers, advising some to avoid particular areas while abroad after cases of chikungunya, a rare mosquito-borne virus, jumped in 2024.
UKHSA warning and case numbers
UKHSA said in a post on X: 'Are you, or someone you know, heading off on a tropical trip? It's worth being aware of chikungunya, a mosquito-borne virus that can cause severe joint pain. Check out our blog post to learn how to stay protected.'
According to UKHSA, there were 112 confirmed and probable cases of chikungunya reported among travellers returning to England, Wales and Northern Ireland in 2024 – almost one and a half times the number reported in 2023. 'Travel to India accounted for the majority of these cases, followed by travel to Pakistan and Brazil – all popular destinations for people travelling from the UK,' UKHSA added.
Global impact and prevention
The World Health Organisation (WHO) reports that between January 2025 and September 2025, chikungunya caused 40 deaths in Europe and around 115 deaths in the Americas. There are currently no targeted treatments, so preventing mosquito bites is essential.
Recommended precautions include using repellent containing DEET or picaridin on exposed skin, wearing loose-fitting, light-coloured clothing to cover arms and legs, and avoiding 'areas with natural and artificial water containers' where mosquitoes breed. UKHSA guidance notes: 'Unlike some mosquito species that prefer rural areas, Aedes mosquitoes thrive in urban environments and often bite indoors, making hotel room precautions equally important.'
Symptoms and complications
First symptoms are usually a high fever and severe joint pain, often worse in small joints or where there have been previous injuries. Many also experience muscle pain, headaches, sensitivity to light, and skin rashes. Most people recover within a fortnight, but joint pain can persist for months or years. Around one in every 1,000 people experience serious complications. Young babies, elderly people, and those with underlying health conditions are more at risk. UKHSA adds: 'Occasional complications affecting the eyes, nervous system, heart, and digestive system have been reported.'
