Mosquito season is no longer a minor inconvenience: how insects are entering travel planning
Mosquitoes have turned from a common summer nuisance into a factor that increasingly affects the choice of accommodation, travel dates, excursions and travel insurance. From river cities and lake areas to tropical islands, travellers no longer check only the price, distance from the beach or transport connections, but also whether the accommodation has window screens, air conditioning, the possibility of sleeping in an enclosed room and good access to healthcare. Such a check does not mean giving up travel, but rather planning more realistically at a time when the mosquito season is getting longer and certain species are spreading to new areas.
According to the World Health Organization, vector-borne diseases account for more than 17 percent of all infectious diseases and cause more than 700,000 deaths worldwide each year. This group includes diseases transmitted by mosquitoes, ticks, flies and other arthropods, and among the better-known ones are malaria, dengue, yellow fever, chikungunya, Zika and West Nile fever. For travellers, it is especially important that risk is not assessed only by country, but by the exact region, season, altitude, length of stay, accommodation and planned activities. The same destination can have a different risk profile in the dry and rainy seasons, in the urban core and near a marshy or river area.
The European Centre for Disease Prevention and Control warned in 2025 that Europe is recording longer and more intense seasons of transmission of mosquito-borne diseases, including West Nile fever and chikungunya. According to ECDC maps from June 2025, the Asian tiger mosquito, Aedes albopictus, is established in 369 regions of the European Union and the European Economic Area, including regions in Croatia, Italy, Spain, France, Slovenia, Greece and other countries. In January 2026, the European Commission published a summary of a scientific study according to which cities such as Paris, Vienna and Zagreb could be exposed to a greater risk of outbreaks of dengue, Zika and chikungunya if the spread of favourable conditions for Aedes mosquitoes continues. This does not mean that such destinations are unsafe in themselves, but it does mean that mosquitoes are increasingly being viewed as a real element of travel assessment.
Why mosquitoes increasingly influence the choice of destination
The risk from mosquitoes is not the same in all destinations that may look similar at first glance. River cities, lakes, areas with irrigation, tropical islands and dense urban neighbourhoods with many small water containers can have a different exposure profile from dry, windy or well-maintained locations. Mosquitoes breed in standing water, and for some species even small amounts of water in flowerpot saucers, buckets, discarded tyres, poorly maintained drains or decorative containers are enough. That is why the danger cannot be assessed only by whether a destination is exotic, but by local conditions, municipal maintenance and the season.
According to the U.S. CDC, travellers should check current health risks for their destination before departure because mosquitoes can transmit viruses and parasites that are not equally present in all parts of the world. The same source states that some diseases can be prevented by vaccination or medication, for example yellow fever or malaria in certain circumstances, while for others the traveller mainly relies on avoiding bites. This is a key practical difference. For some trips, repellent, lightweight long-sleeved clothing and caution when choosing excursions are enough, while for others it is necessary to seek advice from a travel medicine doctor in good time and check whether malaria chemoprophylaxis is recommended.
Accommodation: screens and air conditioning are no longer just a matter of comfort
The first practical filter when booking accommodation is becoming physical protection from mosquitoes. Accommodation with properly installed screens on windows and doors, air conditioning and the possibility of sleeping in an enclosed room reduces the likelihood of bites, especially in areas where mosquitoes are active at night. In its chapter on malaria, the CDC recommends staying in enclosed air-conditioned rooms or well-protected spaces with screens, sleeping under a mosquito net, preferably treated with insecticide, and taking additional measures in the evening and night hours. These guidelines are health-related, but they are also very useful when assessing hotels, apartments, campsites and holiday homes.
When booking, it is not enough for the accommodation description to generally mention a “natural setting” or “proximity to the river”. It is useful to check whether every bedroom has screens, whether the windows work properly, whether there is air conditioning, whether the property is next to standing water and how the surroundings are maintained. Accommodation with a swimming pool is not a problem if the water is regularly maintained, but neglected fountains, containers, buckets, channels and poorly maintained yards can increase the number of mosquitoes. In campsites, bungalows and open-type properties, it is especially important to ask whether protection during sleep is possible, because a night’s rest without a net in risky areas can be a bigger problem than a few bites during the day.
Excursions and daily rhythm: it matters when you go to a river or lake
Planning excursions increasingly includes the question of the time of day. Anopheles mosquitoes, important for malaria transmission, are generally a greater risk from dusk to dawn, while Aedes mosquitoes, linked to dengue, Zika and chikungunya, often bite during the day, especially in the morning and late afternoon. For this reason, the same traveller may need a different protection routine in different destinations. An evening boat ride on a river, watching the sunset by a lake or dinner in a garden can be attractive parts of a trip, but during mosquito season they require long sleeves, long trousers and an appropriate repellent.
According to the CDC, repellents registered with the U.S. Environmental Protection Agency are recommended, including products with active ingredients such as DEET, picaridin, IR3535, oil of lemon eucalyptus, PMD and 2-undecanone. In practice, it is important to follow the manufacturer’s instructions, not to apply repellent to damaged skin and to pay attention to age restrictions for children. Sun protection and mosquito protection can be combined, but sunscreen is usually applied first and then repellent, in accordance with the product instructions. Light-coloured clothing with a denser weave and long sleeves can reduce the number of bites, especially near water, vegetation and in areas with higher humidity.
Travellers who book guided excursions should check how long they will stay outdoors, whether it is possible to return before dusk and whether the organisers are familiar with local conditions. Families with small children, pregnant women, older people and people with chronic illnesses should be especially careful because some infections transmitted by mosquitoes can have a more severe course. The WHO states that dengue can range from a mild illness to severe dengue, which requires urgent medical care. For this reason, planning excursions is not only about comfort, but also about access to help if fever, severe pain, rash, bleeding or other serious symptoms develop after a bite.
Repellents, nets and clothing: small equipment can change an entire trip
In destinations with an increased mosquito risk, the basic travel kit should include repellent, lightweight long-sleeved clothing, socks, possibly permethrin-treated clothing and a sleeping net if the accommodation does not guarantee protection. The CDC states that permethrin-treated nets provide better protection than untreated nets, and when buying one it is recommended to choose a compact, white, rectangular net long enough to tuck under the mattress. Such a detail can be important in simple accommodation, on multi-day tours, in rural areas or where the quality of window screens cannot be reliably checked in advance.
Repellent is not a one-time solution for the whole day. Its effectiveness depends on the active ingredient, concentration, sweating, swimming, rain and the length of time spent outdoors. Travellers often make the mistake of applying repellent only before leaving the accommodation and then not reapplying it during a longer excursion. Another common mistake is relying exclusively on wristbands, scented candles or electrical devices without proven skin and clothing protection. Such products may have limited practical value, but they do not replace proven effective measures in areas where there is a risk of mosquito-borne diseases.
It is also important to think about returning to the accommodation. Doors and windows should not remain open with the light on, especially in the evening. The bed net should be properly set up, without holes and without touching the body during sleep, because mosquitoes can bite through the net if the skin presses against it. In apartments and holiday homes, it is useful to remove standing water from containers on the terrace or balcony, if this is possible and safe. Such small measures do not solve the broader mosquito problem, but they can significantly reduce the number of bites during the stay.
Health advice before travel is not only for tropical destinations
Medical advice before travel is especially important for destinations where malaria, yellow fever, dengue, Japanese encephalitis, Zika or chikungunya are present. The WHO recommends that people planning a trip seek information or advice about possible health risks before travelling, including vaccination requirements and protective measures. For some areas, proof of vaccination against yellow fever may be required or recommended, while for malaria it is assessed whether preventive medication should be taken. The decision about prophylaxis should not be made based on general advice from the internet, but according to the itinerary, the person’s health status and current recommendations.
With dengue, Zika and chikungunya, the situation is different because protection largely relies on preventing bites. The WHO states that dengue is transmitted by infected mosquitoes and that symptoms can include high fever, headache, muscle and joint pain, rash, nausea and vomiting, while severe forms require urgent care. Zika is especially important for pregnant women and people planning pregnancy because public health recommendations often highlight additional precautionary measures. A traveller who becomes ill after returning should tell the doctor where he or she travelled and when the symptoms appeared, because this information can speed up diagnosis.
Travel insurance: what to check before booking
The spread of mosquito-borne diseases is also changing the way travel insurance policies are read. According to the CDC chapter on travel insurance, trip interruption insurance, travel health insurance and medical evacuation insurance are different types of coverage, although they are often sold together. This is important because a policy that reimburses flight cancellation does not necessarily have to cover treatment in a private hospital, an extended stay due to illness or medical transport to another country. When travelling to remote areas, islands or regions with limited healthcare infrastructure, medical evacuation can be just as important as reimbursement of treatment costs itself.
Before buying a policy, one should check whether the insurance covers diseases acquired during travel, emergency examinations, laboratory diagnostics, hospitalisation, extended accommodation for medical reasons, accompaniment by a family member and return to the country of residence if doctors assess that it is necessary. It is also useful to check exclusions: some insurance policies may limit coverage if the trip is to an area for which there is an official warning, if the traveller does not follow medical recommendations or if it concerns a pre-existing medical condition. Conditions differ among insurers, so they should be read before travel, not only after symptoms appear.
How to check the risk before booking
The first step is to check official health recommendations for the destination. It is useful to look at the websites of national public health services, the WHO, the CDC Travelers' Health portal and the ECDC for the European context. Then the travel date should be compared with the local rainy season, humidity level, reported outbreaks and type of activities. A traveller planning a business stay in an air-conditioned hotel in the city centre does not have the same risk profile as a person going on a multi-day field excursion, sleeping in simple accommodation and staying near water at dusk.
The second step is checking the accommodation. In the description or in a query to the host, clear information should be requested: whether there are screens on the windows, whether there is air conditioning, what the property’s location is like, whether the surroundings are maintained and whether it is possible to sleep under a net. For properties that emphasise “eco”, “glamping”, “by the river” or “in a tropical garden”, such questions are not a sign of exaggeration, but a normal check of conditions. Guest reviews can be useful if comments about mosquitoes are repeated in them, but a single review does not have to reflect the situation in another season.
Mosquitoes will not affect every destination and every trip in the same way, but their role in planning is clearly growing. In some cases it will be enough to choose accommodation with screens and bring a quality repellent. In other cases it will be necessary to seek medical advice, check malaria prophylaxis, avoid certain evening activities or arrange broader health and evacuation insurance. According to available data from public health institutions, the spread of invasive mosquito species and changes in seasons of disease transmission do not mean that panic should be created, but that protection against bites is becoming part of basic travel culture.
Sources:
- World Health Organization (WHO) – data on vector-borne diseases and the global public health burden (link)
- World Health Organization (WHO) – information on dengue, symptoms, transmission and prevention (link)
- WHO Travel advice – general recommendations for checking health risks before travel (link)
- Centers for Disease Control and Prevention (CDC) – recommendations for protection against insect bites while travelling (link)
- CDC Yellow Book – recommendations for malaria, staying in air-conditioned or protected spaces and mosquito nets (link)
- CDC – information on mosquito nets and permethrin-treated nets (link)
- CDC Yellow Book – explanation of the differences between travel health insurance, trip interruption insurance and medical evacuation (link)
- European Centre for Disease Prevention and Control (ECDC) – distribution of Aedes albopictus in Europe in June 2025 (link)
- European Centre for Disease Prevention and Control (ECDC) – warning about longer seasons of mosquito-borne diseases in Europe in 2025 (link)
- European Commission, Directorate-General for Environment – summary of a study on the greater risk for European cities due to the spread of Aedes mosquitoes and climate change (link)