I live in the city and we have lots of strays so catching diseases is a legitimate concern here. What my vet told me was to wait until the 2nd shot and then have them walk in the center of the side walk, not near the buildings nor the trees.
The problem is that lots of dogs pee on the side of buildings or around/on the trees and an unvaccinated dog could sniff/lick that spot where other dogs have peed and leave contaminated mucus. Walking down the center of the sidewalk and avoiding poop would make the risk minimal according to the vet.
The problem is that lots of dogs pee on the side of buildings or around/on the trees and an unvaccinated dog could sniff/lick that spot where other dogs have peed and leave contaminated mucus. Walking down the center of the sidewalk and avoiding poop would make the risk minimal according to the vet.