Jeff Duncan actually said...
When I travel I carry a yellow card with me in addition to my passport to have a record of all the shots that I have taken--immunizations--and as a father of three sons, when my sons entered kindergarten and grade school we had to provide an immunization record for them and I would argue that they probably would not have been able to attend public schools in South Carolina without certain immunizations and vaccinations.
Context
Discussing the importance of vaccination records for school attendance.
02/26/2019