For most of us, tropical diseases belong somewhere far away. Malaria, dengue, West Nile virus — those sound like illnesses you’d worry about when traveling abroad, not while sitting in your garden in Europe. But the reality is shifting. As Europe heats up, mosquitoes are thriving in places they never could before. And with them come viruses that were once considered “exotic.”
From Rare to Routine
In Sardinia, doctors once faced a baffling case: a patient with high fever and confusion and signs of possible brain inflammation. The diagnosis turned out to be West Nile virus, which until recently was almost unheard of in the region. Dr. Maria Valentina Marras, an infectious disease specialist in Oristano, says it’s become an annual event now. “Every summer we have a West Nile emergency,” she explains (O’Leary 2025). What was once a rare occurrence has turned routine, and this isn’t an isolated story. Across Europe, cases of mosquito-borne illnesses are rising steadily.
Why Mosquitoes Are on the Move
The answer is simple, mosquitoes love heat and water. Climate change is serving up both in new places, longer summers mean longer breeding seasons and warmer winters allow eggs to survive. Add in global trade and travel, which spread species like the Asian tiger mosquito, and outbreaks become inevitable. Once established, all it takes is one infected traveller to set off local transmission. And because warmer temperatures speed up how viruses replicate inside mosquitoes, infections spread faster. In recent years, France has reported local outbreaks of Chikungunya, a virus causing weeks of painful joints. And Italy has logged hundreds of West Nile infections and multiple deaths.
What This Means for Us
Should we panic? Not quite. Most people infected with West Nile never even notice, but some suffer serious neurological problems. Chikungunya rarely kills, but it can leave people debilitated for months. Even when cases are mild, outbreaks stretch health systems and hospitals must prepare each summer. Public health officials spend time spraying insecticides, draining water, and warning residents. In other words, climate change isn’t just about melting glaciers — it’s reshaping healthcare right here.
A Bigger Wake-Up Call
The rise of tropical diseases in Europe is a symptom of a bigger problem. As the climate warms, diseases once limited to the tropics will keep moving north. Experts say adaptation will require:
- Stronger mosquito control programs.
- Better training for doctors.
- Public awareness campaigns.
- International cooperation, since mosquitoes don’t respect borders.
And of course, addressing climate change itself remains key. Without action, outbreaks will only grow.
What We Learned From COVID
The pandemic showed us how quickly diseases can upend daily life. While mosquito-borne illnesses don’t spread from person to person, they still inspire fear. “Life all over the world has changed since 2020,” says Dr. Marras. “People are very afraid of these diseases, even though they aren’t transmitted human-to-human” (O’Leary 2025).
That fear can be a challenge, but it also means communities may be quicker to listen to prevention advice — and when it comes to mosquitoes, prevention is everything.
How to Protect Yourself
The good news: simple steps can cut your risk dramatically. By following an acronym called C.L.O.A.K., you can significantly reduce the likelihood of being bitten.
C – Cover Up: Wear long sleeves and trousers to protect your skin.
L – Light and Loose: Opt for light-coloured, loose clothes. Mosquitos are drawn to dark colours, so keep it bright and breezy.
O – Odour Control: Some bodily odours and scented products attract insects. Wash
thoroughly with unscented or citrus products.
A – Apply Repellent: Use a natural insect repellent such as incognito®.
K – Keep Them Out: Keep mosquitos out of your dwelling (incognito have a Room Refresher and Incense Sticks which work well). Eliminate nearby stagnant water because mosquitoes breed in standing water in as little as five days.
Looking Ahead
Europe is already living with tropical diseases. Each summer brings new outbreaks, new cases, and new lessons. The question isn’t if they’ll happen again, but how ready we’ll
be when they do. So, the next time you swat a mosquito on a warm evening, remember, it’s not just a nuisance. It’s a reminder of how connected our health is to the climate and how urgently we need to act.
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