When a dog bites you, the initial reaction is to get away from the animal and to get help. That's a good thing to do, especially if you're badly hurt. However, it's also important to try to keep the dog in a nearby area. Only by identifying and trapping the animal can you be sure of its vaccinations and if you need certain treatments following the bite.
For example, if a stray dog bites you, it is wise to try to capture the dog. If it is microchipped or has a collar with tags, the owner may be identified and held accountable for the dog's actions. Tags on the dog could also help identify if it has received recent vaccines, which are necessary to avoid needing certain treatments, like those for rabies.
What happens if a dog bites you and it isn't vaccinated?
This is a major concern from a medical standpoint. If the owner admits that the dog has not been vaccinated, it will need to go into quarantine. If the dog is not euthanized for the attack, it will likely have to have vaccines before it's released to the owner or a new family.
You'll need many medical treatments if the dog doesn't have vaccines. You could need a tetanus shot, rabies shot series and others. You will likely need to take antibiotics to prevent infection as well.
These treatments are on top of others, like surgery to repair torn muscles or to clear deep wounds. Know your rights in this situation. The owner should be held liable for your injuries.