I’d just like to say as someone with very recent experience with an overly aggressive canine…. Look up the laws in your city, and do it NOW.
If a dog draws blood, quite often it must immediately become a ward of the city you live in, and be quarantined up to a week or more. {You WILL be on the line for those boarding + quarantine fees and any fines for bodily harm.} They will keep an eye on the animal, and test it for things like rabies to rule those out. Whether or not the animal is put down is then wholly up to Animal Control/analogous group. If they deem the animal to be too dangerous to live, it will be put down. If they feel it can be trained, it might be given to someone with experience and the time to retrain it.
BUT. A very very important thing to know is that you COULD be breaking the law by having the dog put down yourself, giving it away, to a shelter, or otherwise surrendering the animal if it is NOT given to an Animal Control officer through their office number.
I strongly advise you to look up your local laws and act accordingly within the fullest compliance possible for your own safety, the safety of your family, and the well being of your animal.