Puppies can typically start going outside after they have received their initial vaccinations, which usually occurs around 16 weeks of age. However, it's important to consider a few factors:

1. **Vaccination Schedule**: Puppies usually receive a series of vaccinations starting at 6-8 weeks, followed by boosters every 3-4 weeks until they are about 16 weeks old. Consult your veterinarian for the specific vaccination schedule for your puppy.

2. **Socialization**: While waiting for vaccinations to be completed, it's crucial to socialize your puppy. You can do this safely by introducing them to various sounds, sights, and smells in your home and yard. You can also carry them to safe areas where they won’t come into contact with unvaccinated dogs.

3. **Veterinarian's Advice**: Always consult your veterinarian. They may recommend waiting until your puppy has had all their vaccinations, including rabies, before exposing them to public areas where other dogs frequent.

4. **Controlled Environments**: Once your puppy has had at least one round of vaccinations, you can start taking them to controlled environments, like your own backyard, where they are less likely to encounter unvaccinated dogs.

5. **Monitoring Health**: After your puppy has been outside, monitor them for any signs of illness. If they seem unwell, contact your veterinarian.

In summary, while you can start taking your puppy outside after they have had their vaccinations, it's best to wait until they are fully vaccinated, which is generally around 16 weeks, to ensure their safety and health.

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Topics covered in this question:

Dog Training Puppy Socialization Puppy Care Vaccinations Outdoor Safety