Overview
- City data show West Nile virus detections in mosquito pools have jumped to about 850 positive pools, with Queens accounting for roughly 43% and Staten Island about 33% of samples.
- No human West Nile cases have been reported in New York City as of early August, but the Health Department has scheduled targeted aerial larviciding over wetlands and truck-based adulticiding in affected neighborhoods in mid-August, weather permitting.
- The city is increasing weekly trapping and pooled testing, adding traps in hot spots and using helicopter drops over nonresidential marshes to kill larvae before they become biting adults.
- National surveillance shows an unusually early season with 143 U.S. cases reported and Arizona as the largest hotspot, underscoring why officials are scaling local control and public warnings.
- Officials urge simple actions to cut risk—empty standing water, use EPA-registered repellents, repair screens, and avoid outdoor time at dawn and dusk—and say control operations typically cut adult mosquito numbers by about 70% and positive pools by more than 85%.