The death this month of an immunocompromised adult at a local hospital “after experiencing West Nile virus symptoms” is the county's second reported human case of the potentially deadly mosquito-borne virus. The other patient is recovering at home.

The vector control district said there is no need for residents to relocate during the treatment, but people can close windows and stay inside to minimize exposure to the insecticide

Residents will not have to relocate during the treatment, which officials said poses minimal risk to people, pets, animals and the environment.

Residents don't need to relocate during the spraying, since the treatment poses minimal risk to people, pets, animals and the environment, according to Santa Clara County.

This is not the first time this year the West Nile virus has been detected in mosquitoes in Santa Clara County. The county detected cases and treated areas of Santa Clara and Sunnyvale at the end of August.

Santa Clara County will chemically fog parts of San Jose after some mosquitoes tested positive for West Nile Virus.

Environmental nonprofit Healthy Alternatives to Pesticides takes legal action against Santa Clara County over pesticide spraying.

Mosquitoes found in Campbell, Los Gatos, Monte Sereno and San Jose tested positive for West Nile Virus, county officials warned Monday.