Hunters, Breakers, and Primals have NO blood type
They have an extra organ
Their genetic code is unbelievably adaptive
They can with practice control their metabolic rate
Depending on their ability they can live on indefinitely existing as pure energy
It takes 200 years for them to lose all traces of human genetics or whatever the original race was
How turning someone works, as I said they have an extra organ, secretes a genetic catalyst called Venom for lack of a better word, they must build up alot of this in their mouth, like saliva, and the get it in the person's bloodstream.
Most people would say that Walkers are just half human half the creatures that their persona is, example being werewolf, they are not, the moon has no control over their transformation, they are not weak against silver, let's see what other stereotypes are there...,
The moon can affect their mood, or cause their personality to alter, they are weak against opposing abilities, and can generally live on indefinitely, most have energy based ability that alter their bodies to allow them to reform.
Downside to this is that if their bodies are destroyed it takes a long time to reform and they need to amass organic matter and ambient energy (living things, electricity, fire, EM fields, solar energy) this can throw off the balance of a planet or solar system.
NONE of them can manipulate time, but trans-dimensional and spatial abilities are not that rare, but they are complicated and dangerous