When a public health official has reason to believe that the continued presence in an institution of higher education of a student who has not been immunized against measles or rubella presents a clear danger to the health of others, the public health official shall notify the chief administrative officer of such institution. Such chief administrative officer shall cause the student to be excluded from the institution, or confined in an infirmary or other medical facility at the institution, until the student presents to such chief administrative officer a certificate from a physician, a physician assistant or an advanced practice registered nurse stating that, in the opinion of such physician, physician assistant or advanced practice registered nurse, the presence in the institution of the student does not present a clear danger to the health of others.