Ok I really... I mean REEEEEEAAAAAAALLY hate needles.... but I don't hate them enough to have to eat a Zebra Danio. No way jose. I love my fishies, and it would be too nasty and plain MEAN to eat one of their relatives!
It just makes no sense. Whats the problem with needles? Isn't it just a little bit easier to poke someone with a needle than to raise fish with the appropriate amount in them to act as vaccines? And how would you get children to take their fish? Or more likely how would you stop children from cleaning out your tank after they got home from the doctor's!