Tdap (Pertussis) Booster Requirement For the 2013-2014 school year, and all future school years, all students entering, advancing or transferring into 7th grade will need proof of an adolescent whooping cough booster immunization (called “Tdap”) for school in the fall. This requirement applies to all public and private schools. The new requirement was signed into law in 2010. Click on headline for more information.