As our world becomes increasingly interconnected, the United Kingdom faces infectious disease challenges that are typically associated with more destinations in the Southern Hemisphere.
One significant concern is the potential introduction of invasive mosquito species in the UK, particularly the tiger mosquito (Aedes albopictus).
As of July 2, 2025, the UK Health Security Agency (UKHSA) reports that the infectious virus-carrying tiger mosquito has not been found in the UK.
However, according to the UKHSA blog, this mosquito is raising alarms among public health officials across Europe, and for good reason.
The tiger mosquito is not just any mosquito. It is highly adaptable, capable of breeding in both natural and artificial water containers.
And unlike many other mosquito species, it is active during the day. Additionally, its eggs can survive frost, enabling it to establish itself in cooler climates.
This mosquito has already spread across much of mainland Europe and has been associated with outbreaks of dengue, chikungunya, and Zika viruses. During 2025 and 2024, France reported numerous locally acquired cases of these serious diseases.
The UKHSA Medical Entomology and Zoonoses Ecology (MEZE) team is leading efforts to monitor and respond to this emerging threat in the UK. Their work includes assessing the risks posed by arthropods that can transmit diseases.
When eggs of invasive mosquitoes are found, a cross-government contingency plan is triggered. The MEZE team deploys to the site, sets up enhanced surveillance, and provides control advice to local authorities.
The surveillance focuses on potential entry points such as seaports, ferry terminals, distribution centers, and parks, anywhere the mosquito might hitch a ride into the UK.
Climate modelling suggests that parts of South East England, particularly around London, may already have suitable conditions for the mosquito’s survival, prompting intensified surveillance in these areas.
While the risk of vector-borne diseases in the UK remains low, vigilance is key. This is essential since travel-related infectious disease cases continue to be reported in the UK in 2025, which may lead to future local case detections.
As global travel increases, the work of the MEZE team becomes ever more crucial in protecting public health.
By staying informed and participating in citizen science efforts, we can all contribute to safeguarding the UK against these tiny but potentially hazardous invaders, the UKHSA concluded.
