The Sea Wasp (Ryk E. Spoor)

misses the point, which is to ask: Would you give over your life to care for your own child? Would you risk taking on her illness in the hopes of protecting her, whatever that might mean?

If that's the core question that whoever intended to ask, they should have done so in a less emotionally-charged way. The word 'vampire' evokes strong imagery and emotions.

Try this: A nanotech experiment has escaped from a laboratory and infected some of the populace, including your daughter. Nobody knows what the nanites are doing to these people. It is likely to change their bodies and their minds in unknown ways, but nobody knows how. The infection is not contagious but it can be transmitted between willing participants. What do you do?

I think the answer here is very clear; without the connotations of demonic presenses and immortality, it's plain that your daughter is sick and you should care for her, but acquiring her illness yourself just to better understand her condition is idiotic. If it detrimentally affects your mind, how will that help you help her?

But maybe that's just my perspective, and as I said before any excuse to stake five-year-olds is okay by me.