A Yonkers resident has tested positive for West Nile virus, the first confirmed human case in Westchester County this season, county health officials said Tuesday. The patient had recently traveled outside the county, and health staff are still working to determine whether the infection happened during that trip or closer to home.
That unresolved detail is the most practically important part of the announcement for Westchester and lower Hudson Valley households. A case tied to travel says something different about local risk than a case tied to a backyard. Until the county finishes its work, residents do not yet know which it is.
