
Chikungunya risk expands across Europe as climate warms, study finds
A new study shows warmer European temperatures could enable chikungunya transmission by the invasive Asian tiger mosquito for six months of the year in southern Europe and several months in much of western Europe, lowering the transmission threshold to about 13–14°C (down from 16–18°C). This broadens areas and seasons at risk, with outbreaks historically sparked by travel but potentially escalating locally as mosquitoes move northward. The finding underscores the need for surveillance, mosquito-control measures, and personal protection to prevent bites; the UK has yet to see local transmission, though imported cases rose in 2025.













