title: "How the ECDC Tracks Mosquitoes Across Europe" date: "2026-04-03" excerpt: "Discover how the ECDC and VectorNet programme monitor mosquito populations across Europe, including surveillance methods, Mosquito Alert citizen science, and weekly disease reports." category: "regulations" author: "Mosticare Editorial"

How the ECDC Tracks Mosquitoes Across Europe

Somewhere in Stockholm, inside the headquarters of the European Centre for Disease Prevention and Control, analysts are mapping the movement of mosquitoes across a continent. Their work is not theoretical. As mosquito-borne diseases increasingly affect European countries -- with dengue, chikungunya, and West Nile virus all causing local transmission in recent years -- the ability to track where mosquitoes are and where they are heading has become a frontline public health capability.

This article explains how Europe's mosquito surveillance system works, from the institutional machinery of the ECDC to the smartphone app that turns ordinary citizens into field researchers.

The ECDC's Role in Vector Surveillance

The European Centre for Disease Prevention and Control is the EU agency responsible for strengthening Europe's defences against infectious diseases. While the ECDC does not directly control mosquitoes -- that remains a national and local responsibility -- it provides the data infrastructure, risk assessments, and technical guidance that inform how member states respond.

The ECDC's vector surveillance activities operate on several levels. At the broadest level, the agency maintains mosquito distribution maps that show the known presence and establishment status of key species across Europe. These maps, updated regularly, are the most authoritative public source for understanding which mosquito species are where.

The agency also publishes guidelines for the surveillance of both invasive and native mosquitoes in Europe, establishing standardised methods that allow data from different countries to be compared and aggregated. Without this standardisation, the patchwork of national monitoring efforts would produce data that is difficult to interpret at the continental scale.

VectorNet: Europe's Surveillance Network

The backbone of Europe's mosquito tracking system is VectorNet, a joint initiative of the ECDC and the European Food Safety Authority (EFSA). Launched in May 2014 and now in its third phase (2024-2028), VectorNet is a network of entomological and public health experts who collect, validate, and map data on vectors and pathogens across Europe and the Mediterranean basin.

How VectorNet Works

VectorNet is organised around vector group leaders (VGLs) -- specialists who coordinate data collection for specific vector types: mosquitoes, ticks, sandflies, and biting midges. For mosquitoes, the VGLs work with national surveillance networks to gather occurrence data, which is then standardised and fed into a central database.

The data comes from multiple sources. Active surveillance involves targeted field surveys using standardised trapping methods -- ovitraps (containers that attract egg-laying mosquitoes), BG-Sentinel traps (which mimic human scent), and larval surveys of breeding sites. Passive surveillance includes reports from existing monitoring programmes, hospital-based disease detection, and increasingly, citizen science contributions.

VectorNet's outputs include species distribution maps, risk maps, and data analyses that feed into the ECDC's threat assessments. When a new mosquito species is detected in a previously unaffected area -- such as the recent establishment of Aedes albopictus in Cyprus and Slovakia -- VectorNet provides the verification and context.

The Expanding Range of Aedes Albopictus

The species receiving the most attention from VectorNet is Aedes albopictus, the Asian tiger mosquito. As of June 2025, this species has established populations in 369 regions across the EU/EEA, with continued expansion reported in Austria, Belgium, France, Germany, Greece, Hungary, Portugal, Serbia, Slovenia, Spain, and Switzerland.

This expansion is not merely a nuisance concern. Aedes albopictus is a competent vector for dengue, chikungunya, and Zika viruses. The ECDC tracks its spread precisely because each new area of establishment represents a new area of potential disease transmission.

Mosquito Alert: Citizens as Surveillance Partners

One of the most innovative elements of Europe's mosquito monitoring infrastructure is Mosquito Alert, a citizen science platform that enables members of the public to report mosquito sightings using a smartphone app. Originally developed in Spain, Mosquito Alert has expanded across Europe and represents a new paradigm in vector surveillance.

How Citizen Science Contributes

Traditional mosquito surveillance requires trained entomologists, specialised equipment, and significant funding. It necessarily covers only a fraction of the landscape. Citizen science fills the gaps by harnessing the observational power of millions of people going about their daily lives.

When a user spots a mosquito they suspect might be an invasive species, they photograph it through the Mosquito Alert app and submit the image along with location data. The image is then reviewed by expert entomologists who validate or correct the identification. Validated reports feed into the same databases used by VectorNet and national surveillance programmes.

The approach has produced tangible results. Citizen science reports have led to the discovery of tiger mosquito populations in Andalusia and the identification of new populations of Aedes japonicus in Germany -- detections that might have been missed or delayed by conventional surveillance networks.

Strengths and Limitations

Citizen science excels at wide-area detection -- finding mosquitoes in places where no professional surveyor is looking. It is particularly valuable for early detection of invasive species in new areas, because residents often notice unfamiliar mosquitoes before surveillance teams arrive.

However, citizen science has limitations. Reports are concentrated in populated areas, leaving rural and peri-urban breeding sites underrepresented. Species identification from photos can be challenging, and the data requires expert validation before it can be used for official surveillance purposes. The ECDC and VectorNet treat citizen science as a complement to, not a replacement for, professional surveillance.

Weekly Reports and Rapid Risk Assessments

The ECDC translates surveillance data into actionable intelligence through regular reporting and rapid risk assessments.

Seasonal Surveillance Reports

During the mosquito season (typically May through November in southern Europe), the ECDC publishes weekly epidemiological updates on mosquito-borne disease cases in Europe. These reports track locally acquired and travel-associated cases of dengue, chikungunya, West Nile virus, and other arboviral infections.

The reports serve multiple audiences. Public health authorities use them to calibrate their response efforts. Healthcare providers use them to inform diagnostic decisions. And increasingly, the media and public use them to understand the mosquito-borne disease risk in their area.

Rapid Risk Assessments

When unusual disease events occur -- such as the 290 locally acquired chikungunya cases reported in Europe by August 2025, compared to just one case in all of 2024 -- the ECDC can issue rapid risk assessments. These documents evaluate the likelihood of further spread, identify populations at risk, and recommend control measures for member states.

The speed of these assessments matters. Mosquito-borne disease outbreaks can escalate quickly during warm weather, and the window for effective intervention is narrow. By combining real-time surveillance data with epidemiological modelling, the ECDC helps countries respond before outbreaks become uncontrollable.

The Technology Behind the Tracking

Modern mosquito surveillance employs increasingly sophisticated technology beyond traditional traps and manual surveys.

Geospatial Mapping

VectorNet uses Geographic Information Systems (GIS) to create detailed distribution maps that layer mosquito occurrence data with environmental variables such as temperature, rainfall, land use, and urbanisation. These maps help predict where mosquitoes are likely to spread next, enabling proactive rather than reactive surveillance.

Environmental Modelling

Climate and environmental data feed into species distribution models that project how mosquito ranges will shift under different climate scenarios. These models informed the ECDC's assessment that Aedes albopictus could establish in parts of northern Europe previously considered too cold for the species -- projections that have been largely confirmed by subsequent surveillance data.

Genomic Surveillance

Emerging genomic techniques allow researchers to track mosquito populations at the genetic level, identifying the origin of invasive introductions and monitoring the spread of insecticide resistance genes. While not yet routine in European surveillance, genomic approaches are increasingly integrated into VectorNet's research activities.

What This Means for European Households

The ECDC's surveillance system is designed for public health professionals, but its implications reach every household in mosquito-affected areas.

Informed Personal Protection

The ECDC's mosquito maps allow anyone to check whether invasive mosquito species are established in their area. If Aedes albopictus is present in your region, you face a different risk profile than if only native Culex species are found there. This knowledge should inform your personal protection strategy.

Local Government Action

ECDC data and guidelines influence the mosquito control measures that local governments implement. When you see municipal mosquito spraying, larviciding of storm drains, or public awareness campaigns about removing standing water, these efforts are guided by the surveillance framework that the ECDC and VectorNet maintain.

The Case for Physical Barriers

As mosquito ranges expand and disease transmission events become more frequent in Europe, the case for robust household protection strengthens. The ECDC's own guidance emphasises personal protective measures including the use of mosquito nets and window screens alongside community-level vector control.

At Mosticare, we track the ECDC's surveillance data closely because it validates the need for our products. As Aedes albopictus continues to expand across European regions, physical barriers become not just a comfort measure but a genuine health protection tool. Our products are designed for the European context -- homes with windows and doors that need screening, and families that need protection during the day (when Aedes albopictus is most active) as well as at night.

Looking Ahead

The ECDC's surveillance capacity continues to evolve. The third phase of VectorNet (2024-2028) is expected to expand data collection, improve modelling capabilities, and strengthen the integration of citizen science data. The agency has also called for enhanced capacity building in member states, recognising that surveillance is only as strong as its weakest national link.

For European residents, the message is clear: mosquitoes are being tracked with unprecedented precision, and the data consistently shows that their range is expanding. The question is not whether mosquitoes will reach new areas, but how quickly -- and whether households in those areas will be prepared.