I helped a nurse prepare an immunization for a child and administered the vaccine. It wasn't till after I administered the vaccine did I realize my nurse pulled up the wrong vaccine and the infant got a double dose of a vaccine that was given previously. I had to fill out an incidence report with my instructor today and I can't help but feel like this is my fault because I shouldn't have trusted that nurse and I should have reconfirmed what I was giving. I'm scared that this mistake might cost me my seat in the nursing program. Has this ever happened to anyone as a student?