Officials were spraying to kill mosquitos in Skokie on Wednesday, as part of a continuing effort to contain the spread of the West Nile Virus.

CBS 2’s Marissa Bailey reports August is prime time for mosquitos, and if you’re sitting home thinking that you haven’t seen many mosquitos around, experts say they’re out there and you should take precautions.

In north suburban Skokie, where two people have been put into nursing homes after being becoming ill from the West Nile Virus, local leaders are saying close up your screen doors and windows to keep mosquitos out.

Throughout the past three weeks, the North Shore Mosquito Abatement District has seen 90 percent of the mosquito samples its collected test positive for West Nile Virus.

So far this year, there have been at least 12 confirmed human cases of West Nile, including two cases in Skokie.