Don’t buy cheese in a parking lot.

That should probably apply to raw seafood as well.

Winnebago County Health Department Administrator J. Maichle Bacon said at least three people have been sickened and four more cases are being investigated after buying cheese from parking lot vendors.

The Rockford Register Star reports that samples of the cheese are still being tested at the Illinois Department of Public Health laboratory in Springfield, but had been found positive for fecal coliform and Listeria.

The three confirmed cases were positive for the bacteria Campylobacter jejuni. Bacon said,

 “This, of course, is a product that would never be approved for sale.”