The UK Health Security Agency (UKHSA) health officials reported a sharp rise in chikungunya cases among travelers returning from abroad, with 73 cases recorded between January and June 2025 compared to 27 in the same period last year, according to UKHSA statement. The UK Health Security Agency also documented the first-ever cases of Oropouche virus in UK travelers, with three people infected after visiting Brazil. Most chikungunya cases involved travel to Sri Lanka, India, and Mauritius, where local outbreaks are ongoing. The mosquitoes that spread chikungunya can’t survive in the UK’s climate, so there’s no risk of local transmission.
Chikungunya causes sudden fever and severe joint pain that can last for months or even years after infection. While most people recover within two weeks, up to 12% still feel discomfort three years later. The disease rarely kills but can be dangerous for very young children, older adults, and people with other health problems. All 73 UK cases were reported in England, with most in London.
“Chikungunya can be a nasty disease and we’re seeing a worrying increase in cases among travelers returning to the UK,” said Dr. Philip Veal from UKHSA. The mosquito-borne infection can cause severe joint and muscle pain, headaches, light sensitivity, and skin rashes. Two new vaccines are now available privately in the UK – IXCHIQ for ages 18-59 and Vimkunya for ages 12 and up.
The report also showed eight cholera cases linked mainly to travel to India and Ethiopia, while dengue cases dropped 67% to 161 compared to 490 last year. Zika cases fell from nine to four. Health officials also warned about meningococcal disease cases tied to Saudi Arabia pilgrimage travel.
Travelers can protect themselves by using insect repellent, covering skin, and sleeping under treated bed nets in high-risk areas.
