The age at which puppies can go outside depends on their vaccination status and the risk of exposure to diseases. Here are some key points from the search results:

• Puppies can go outside after their second set of vaccinations, which will be given at 12 weeks of age.
• After the first round of vaccination (six to eight weeks), puppies can be taken outside, but only in a private yard and under close supervision.
• Puppies shouldnt go outside in public until they are fully vaccinated, which is usually around 16-20 weeks old.
• Two weeks after the puppy receives their last vaccine, they are considered fully vaccinated and can safely go outside.
• If the puppys last vaccine is given at 16 weeks old, its safe for them to go outside at 18 weeks old. If its given at 17 weeks, then theyre safe at 19 weeks old.
• The critical socialization period for puppies is when theyre 3-12 weeks old, but they arent fully vaccinated until theyre about 18-22 weeks old.

Its important to note that while socialization is crucial for puppies, they should not be taken to public spaces until they are fully vaccinated to avoid the risk of exposure to diseases.