Louisiana law (R.S. 17:170 - Schools of Higher Learning) requires proof of dates of immunization against measles, mumps, rubella, and tetanus-diphtheria for all first-time LSU students born on or after January 1, 1957, and for reentering students (born on or after January 1, 1957) who have been out of school for one semester or longer. The following guidelines are presented for the purpose of ....