I would think that your vaxing question has to do with all your childhood immunizations, your hep-b and influenza vax status. Don't listen to Jenny mcCarthy, the vaccinations will NOT give you Autism.
Are your childhood shots up to date? Did they say anything about running titers for your existing childhood immunization status? And have you had the Hep-b vaccinations and flu shot yet? Did you quit the FDNY academy prior to your getting vaccincated and tested by them? I would suspect that is what they are denying clearance for you.
then again, it might be that you just pissed someone off at the FDNY for quitting and they are making it tough on you.