if a physical condition developed that keeps me from doing my original job, what rights do I have?

It depends. First of all, are you afforded this flexibility under the terms of an employment contract or union agreement? If not, then you may be eligible for protection under the "Americans with Disabilities Act" (ADA). The ADA prohibits employment discrimination on the basis of a worker's disability. The ADA also requires employers to provide "reasonable accommodations" to allow an employee with a qualifying disabilitiy to do their job. In other words, the employer must try to make changes to the workplace or the job (as the case may be), which will enable an employee to do their job despite having a disability. That is unless doing so would pose an "undue hardship" for the employer. Now in your case, an allergy is a disability that is recognized under the ADA. Additionally, as a general rule, re-assigning you to another job would constitute a "reasonable accomodation" which your employer must make. However, there needs to exist a vacant position to transfer you to and it must be one for which you are qualified. That having been said, these cases are not always so clear cut. Accordingly, you can either contact your state's department of labor or consult directly with an employment law attorney for further information.

It depends. First of all, are you afforded this flexibility under the terms of an employment contract or union agreement? If not, then you may be eligible for protection under the "Americans with Disabilities Act" (ADA). The ADA prohibits employment discrimination on the basis of a worker's disability. The ADA also requires employers to provide "reasonable accommodations" to allow an employee with a qualifying disabilitiy to do their job. In other words, the employer must try to make changes to the workplace or the job (as the case may be), which will enable an employee to do their job despite having a disability. That is unless doing so would pose an "undue hardship" for the employer. Now in your case, an allergy is a disability that is recognized under the ADA. Additionally, as a general rule, re-assigning you to another job would constitute a "reasonable accomodation" which your employer must make. However, there needs to exist a vacant position to transfer you to and it must be one for which you are qualified. That having been said, these cases are not always so clear cut. Accordingly, you can either contact your state's department of labor or consult directly with an employment law attorney for further information.