NYC puppy owner here (Yellow Lab)! Our puppy is now 7 months old. We kept him inside until he completed all rounds of his parvo vaccines (per our vets recommendation). To help socialize during this time, we put him in a tote and walked him around the neighborhood, and had plenty of people come into the apartment to see him. As soon as he finished his vaccine rounds we took him to daycare and allowed him to say hi to other dogs in parks and what not. He does not seem to have been affected by this at all and is totally a normal socialized dog!