Shadowing and volunteering question

Is it only if you are in college that you can shadow professionals,especially those in the Healthcare field(vet,doctor,chiropractor,dentist,OT,etc)? Can people who graduated with a bachelor’s degree shadow as well during the time when they are not going back to college? Is there a less chance that you can volunteer at a hospital if you are no longer in college?

There are plenty of volunteer opportunities at hospitals for non college students. Call around to local hospitals.