I don't think that vampirism should be seen in the same light as aids. They were creatures originally associated with the plague, so tu probably would get sick. But to me, unless a vampire bit tu with the intent on turning tu into what he is, nothing would happen.
It can have beneficial affects a well. People who have been bitten o had their blood sucked por vampiros would actually be cured por ingesting the ashes made from the suspected vampiros corazón (but usually, that ended up killing the person afterwards)