Los Angeles County Reports First West Nile Virus Death of 2025 Amid 14 Cases

Los Angeles County health officials have confirmed the first human death from West Nile virus (WNV) in 2025, involving a San Fernando Valley resident who died from a severe neurological form of the illness. The county has reported 14 cases this year, with half in the San Fernando Valley, a known hotspot due to its environmental conditions and persistent standing water influenced by drought. Pasadena recorded its first human case since 2022 but has not detected positive mosquito samples locally, though nearby areas have reported infected mosquitoes. Health officials emphasize the dangers of mosquito-borne diseases like West Nile virus and stress preventive measures such as eliminating standing water, using insect repellent, and maintaining window and door screens. The virus, which is spread by infected mosquitoes that feed on birds, can cause symptoms ranging from mild fever and rash to severe neurological issues like encephalitis and meningitis, potentially leading to death. Despite an average of about 56 cases annually in the county, many infections go unreported due to asymptomatic cases, underscoring the need for continued vigilance during mosquito season.