As far as the supernatural definition of vampire, a blood-sucking immortal that can fly and has an aversion to sunlight, there is not a spell to turn anyone into one. Vampires are fictional creatures that do not exist in the real world.
There are however subcultures of people that call themselves vampires. Again, there is no spell involved to become a member of this lifestyle group. It is simply a choice that people make. So-called vampires mold their lives to mimic the fictional vampire heroes and anti-heroes that they admire. They use vampire aesthetics like fangs, long nails and black clothes and form alternative families, or covens, through vampire role-playing.