I am at university (second year) currently studying Biology and at the moment I am finding cancer biology really interesting. But I know that in this field there is a lot of experiments conducted on animals (eg mice) and I am worried that if I went into a job in this area in the future I would have to inject animals and watch them die. I don't think I would be able to do this. Could you go into cancer biology and do research but not have to work on animals?