Travel-associated chikungunya cases in England have almost tripled this year, according to the UK Health Security Agency (UKHSA).

Between January and June 2025, 73 cases were reported compared with 27 in the same period in 2024 – the highest number recorded for this timeframe. The majority were linked to travel to Sri Lanka, India, and Mauritius, where local outbreaks are ongoing. Most of the reported cases were in London.

For the first time, cases of Oropouche virus were also confirmed in UK travellers. All were linked to travel to Brazil.

Other Travel-Associated Infections

The UKHSA report — Travel-Associated Infections in England, Wales and Northern Ireland: January to June 2025 — also found:

Cholera : Eight cases reported, compared with one in 2024. Most had travelled to India

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