I think the CDC issued some guidelines, but the states still have plenty of leeway to decide how to prioritize their vaccines. In one state a person who works as a butcher or in a grocery store might get it while a farmworker might not and vice versa. It's very up in the air. One variable that wasn't expected was the number of health care workers who have refused to take the vaccination, both in nursing homes and hospitals. That frees the vials up for someone else - if they can get it in time.