Such chances are cumulative over time and number of unvaccinated coworkers. Given a large body of unvaccinated there is no reason to suppose that the chance of infection doesn't continue over many years and approach 1 over multiple years.
I and a lot of others don't accept any reasonable chance that you are going to kill me or my family members at work today.
I and a lot of others don't accept any reasonable chance that you are going to kill me or my family members at work today.