A study predicts that the tiger mosquito (Aedes albopictus), a small, aggressive species known for transmitting diseases like dengue, Zika, and chikungunya, could occupy up to 96% of France by 2085. This would mean that these diseases could spread across nearly the entire country, except possibly along the English Channel coast and some high mountain or northern interior regions. The research suggests that rural and peri-urban areas—those on the edges of cities—may face the highest risk of disease transmission. The tiger mosquito first arrived in France by accident in 2004, likely through international trade. Its spread has been largely driven by climate change, which is altering the habitats of many species. As temperatures in France rise and approach those found in tropical regions where the tiger mosquito naturally lives, the insect is able to reproduce faster, live longer, and bite more often. This makes it more likely to spread disease. To predict the mosquito's future range, researchers used mathematical models combined with climate projections from the Intergovernmental Panel on Climate Change (IPCC). These models looked at two different warming scenarios over the next 60 years: one with a significant temperature rise (+3°C) and another with a moderate increase (+1.8°C). Under the more extreme scenario, the tiger mosquito could establish itself in 89 to 96% of France, while under the moderate scenario, its range would still cover about 72% of the country. This study is notable for its detailed prediction of the mosquito's expansion across France. It shows how disease risk varies depending on a region's latitude and whether it is urban or rural. While cities may have more mosquitoes, the study suggests that rural and peri-urban areas might be more vulnerable because each mosquito bites fewer people repeatedly, increasing the chance of disease spread. Researchers are now exploring how mild winters could allow the mosquito to be active year-round, without needing to hibernate. Future work may include local studies on how urban planning and public health efforts can control mosquito populations. Scientists are also developing a public tool, similar to a "mosquito weather" forecast, to help people understand and prepare for mosquito activity in their area.