How soon before you can you take a puppy out for a walk with other dogs?

I'm collecting a puppy at 9 weeks. It will have had its first injection. Then I think the next one is 12 weeks? How soon after that can you take it out so it can mix with other dogs?

    How soon before you can you take a puppy out for a walk with other dogs?

    I'm collecting a puppy at 9 weeks. It will have had its first injection. Then I think the next one is 12 weeks? How soon after that can you take it out so it can mix with other dogs?...
    Dog Breed Discussions : How soon before you can you take a puppy out for a walk with other dogs?...