Sounds like the nurse was coming from the vantage point of helping this person fulfill requirments for school enrollment. If they know for sure that the person is not immune, then they are obligated to immunize for enrollment. Like if your have had the shot then you have met the requirments unless you have proof to the contrary. The nurse may have seen other cases like your friend.
I have had a similar situation like this happen to me.
I have had all my childhood vaccinations. When both my parents died, my records were given to my aunt that took care of me. She used those records to enroll me into public schools
. There was never a question as to my imminization status.
Those records had been long lost when I applied to nursing school
. Since I had no "proof" I was required to get all the required booster shots. One of them being MMR. (which I should have already been against)
A couple years later and I am applying for a job. They titre my blood and low and behold I am STILL not immune to measles (I am immune to mumps and rubella). Employee health notifies me and gives me another measles only vaccination. It has been about a year now, why havent they called me in to draw another titre to determine if I am immune to measles yet?
Simply put, I have fulfilled the requirments of immunization.
Why are they not concerned that I have had my childhood immunizations, and a adult booster shot and was still not immune to measles? Dont you think that they would want to check because I have a history of not building immunity to measles? Nope, I have met the immunization requirment............