US West Nile Virus Cases Rise, Yet Public Concern Remains Low
Despite increasing West Nile virus cases across the US, public concern remains low. A recent survey highlights gaps in knowledge about transmission, symptoms, and prevention. Learn more about the current situation and how to protect yourself.
Despite a notable increase in West Nile virus cases across the United States this season, public concern about infection risks remains relatively unchanged. The CDC reports over 1,100 cases of West Nile disease in 42 states up to September 23, including nearly 750 severe neuroinvasive cases that affect the brain. The number of cases is approximately 40% higher than typical for this time of year, which is partly attributed to prolonged warmer weather that extends the mosquito season into October, notably impacting states like Colorado with 220 cases.
Most individuals infected with West Nile virus do not exhibit symptoms. Nonetheless, the disease can cause mild flu-like symptoms in some, and in more serious instances, it can lead to neurological complications, hospitalization, and even death.
Interestingly, a recent survey by the Annenberg Public Policy Center of the University of Pennsylvania reveals that only 15% of U.S. adults are worried about contracting West Nile virus or dengue fever within the next three months. This low level of concern persists even amid rising case numbers and an extended mosquito season.
Public knowledge about West Nile virus transmission is relatively high—around 75% recognize that mosquito bites are the primary mode of transmission. However, awareness about symptoms is lacking, with nearly half unsure about what to look for. Knowledge regarding proper mosquito repellent use, such as avoiding applying repellent under clothing or correctly layering sunscreen and insect repellent, remains limited.
Prevention measures such as removing standing water, avoiding outdoor activities during peak mosquito hours, and wearing protective clothing are fairly common. Yet, only about 61% of people routinely take precautions, and awareness about correct repellent application is especially low.
Experts underscore the importance of increased awareness and preventive steps, particularly as climate change fosters longer mosquito seasons. Taking straightforward precautions, like eliminating stagnant water around homes and properly applying insect repellent, can significantly reduce the risk of infection.
This data underscores the need for ongoing public education on West Nile virus risks, transmission, and prevention strategies to better protect communities during the prolonged mosquito season.
Source: https://medicalxpress.com/news/2025-09-cases-west-nile-virus.html
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