The vet said you had to disinfect the yard?? Ask her/him how! Sheesh!
Glad you know what it is and can treat it. I would ask the vet what life span the virus has outdoors and where or what it is found in so you don't have to be worried about everything your dog investigates.
I guess bleach wash any fabric toys too. Wouldn't really hot water do the trick though?
Good luck and glad the pups are ok.