You have to scoop up every infected stool immediately. Like, within minutes. The virus lives in the poop and then seeps into the soil. Wear gloves, use a poop bag, and dispose of it in a sealed trash bag. Don’t compost it. That would be a disaster.
After you scoop, pour that bleach-water mix right onto the spot where the poop was. Even if it kills the grass. Small price for a healthy pup, right? You can always buy new sod later.