While the global Chikungunya outbreak in 2024 impacted over 100 countries, most European countries reported very few Indigenous (locally) acquired cases.
However, according to the European CDC, the geographic expansion of Ae. albopictus mosquitoes to more temperate regions in Europe have increased the risk of arboviral disease outbreaks in 2025.
Europe Adds Second Chikungunya Vaccine
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50% of Northeastern Adult Ticks Carry Lyme Disease
As the snow melts away in the Northeast, hikers will return to the hills in the spring of 2025, and so will an unwanted tick that carries a severe disease.
Researchers from Dartmouth College recently reported that many states in the Northeast—including Connecticut, New York, New Hampshire, Vermont, and Maine — are at risk for contracting Lyme disease during the spring, summer, and fall.
While Pregnant, Chikungunya Infection Can Disrupt Infant Development
Over the past few decades, mosquito-driven outbreaks of Chikungunya disease have occurred in approximately 100 countries, and many adults have been diagnosed with severe cases.
For example, in the Region of the Americas, there were 236 Chikungunya-related fatalities in 2024.
And in 2025, the Pan American Health Organization has already reported 523 Chikungunya cases in Brazil.