First off, I've never understood why some people have fears of injecting...it doesn't make any sense to me. Maybe it's one of those things that's similar to some peoples fear of blood, which I can sort of understand but fear of injecting, no. Think about it, people everywhere do worse stuff to their bodies every single day, more then likely numerous times per day, yet they have no fear of these things. But put a needle to their skin, one that's extremely small, and they go crazy.
This probably didn't help, but it's all I got.