dw.com
West Nile Virus Spreads in Europe and US, Driven by Climate Change and Biodiversity Loss
The West Nile Virus (WNV), transmitted by common mosquitoes, is spreading in Europe and the US due to climate change, impacting human health and highlighting the need for preventative measures.
- What is the current impact of the West Nile Virus (WNV) in Europe and the US?
- In 2024, WNV spread across nearly all German states, infecting both animals and humans primarily in eastern Germany. Greece reported seven deaths from WNV in 2025, and Italy also reported fatalities. The US saw a 40% increase in WNV infections by early September 2025, with 770 cases and 490 severe cases.
- How does climate change contribute to the spread of WNV and other mosquito-borne diseases?
- Warmer temperatures extend the mosquito's active season, increasing their biting frequency, shortening their life cycle, and boosting egg-laying. Higher temperatures also improve the virus's ability to multiply within the mosquito and reach the salivary glands, facilitating transmission. Increased rainfall further supports higher mosquito populations.
- What factors beyond climate change influence the spread of WNV, and what preventative measures are available?
- Reduced biodiversity decreases ecosystem stability, increasing the prevalence of pathogens. A study in Berlin showed higher mosquito and WNV densities in areas with less biodiversity like cemeteries, compared to a renaturalized park. Prevention focuses on avoiding mosquito bites through clothing, nets, and eliminating breeding grounds; promoting biodiversity helps control mosquito populations.
Cognitive Concepts
Framing Bias
The article presents a balanced view of the West Nile Virus outbreak, highlighting both the risks and the complexities of the situation. It avoids alarmist language while still conveying the seriousness of the issue. The emphasis is on scientific understanding and preventative measures, rather than solely focusing on fear-mongering.
Language Bias
The language used is largely neutral and objective. Scientific terminology is used appropriately, and there is no evidence of loaded language or emotional appeals. The quotes from the expert are presented without editorial spin.
Bias by Omission
While the article provides a comprehensive overview of the West Nile Virus, it could benefit from including information on the specific measures being taken by health authorities to control the spread of the virus. Also, a broader discussion of the global implications of the rise in mosquito-borne illnesses beyond the specific examples mentioned could provide additional context.
Sustainable Development Goals
The article directly addresses the spread of West Nile Virus (WNV) in Europe and the US, highlighting the negative impact on public health. The increase in WNV cases, including severe infections and fatalities, directly affects SDG 3 (Good Health and Well-being), which aims to ensure healthy lives and promote well-being for all at all ages. The article details the rising number of infections and deaths caused by the virus, demonstrating a negative impact on this SDG.