The article also points out that one gets sick 3 to 4 days after eating contaminated greens. I wonder if they can be safe by cooking in soup or stew? Two people in Maryland I know have been sick with those symptoms, but not sick enough to be hospitalized. Maryland has had at least one reported case. I also heard a report about norovirus in that area.
The dirty little secret is that feces is the problem here.
The crops could have been watered with feces contaminated water.
Years ago, that’s what caused folks to get sick from eating strawberries imported from Mexico. It was found that the plants had been watered with feces laden water.
People can nose around here for some feces/e coli contamination connections.