I was... kidnapped by some terrorists who wanted to study me. My vampirism and the other things, the mutant things that help me heal and gave me claws.
My friends came to help me escape from them. I don't want to talk about what happened there.
But I think this group was mainly interested in my healing factor. The other vampires on the network, like your family, should be wary but not too concerned.
Private Though, I was forced to turn one. He may still be out there and no one has taught him to be subtle, so keep your eyes open for that.