West Nile Virus Symptoms, Causes and Prevention: What to Know

Key Points:

• West Nile virus cases typically peak in late August to early September, with recent reports indicating infections in 24 states and potential for the highest numbers since the early 2000s, according to CDC data and public health experts.
• The virus is primarily transmitted through bites from infected mosquitoes that have fed on infected birds; symptoms range from none to mild flu-like illness, with rare severe neurological complications.
• Warm summer temperatures increase mosquito populations and virus transmission, making late summer the riskiest period for West Nile virus exposure due to overlapping mosquito activity and human outdoor presence.
• Prevention is crucial as there is no vaccine or specific treatment; recommended protective measures include avoiding mosquito peak activity times, using effective insect repellents containing DEET or picaridin, and managing mosquito breeding sites with products like mosquito dunks.
• Various mosquito control products, such as mosquito dunks, portable repellent dispensers, bug zappers, and body sprays with DEET or picaridin, have been endorsed by experts to reduce the risk of mosquito bites and West Nile virus infection.