In April 2018, the Advisory Committee on Immunization Practices (ACIP) changed the minimum recommended age for the tetanus, diphtheria, and acellular pertussis (Tdap) adolescent booster vaccine from 10 to 11 years. Although the vaccine is approved by the FDA to be given at a younger age as part of a catch-up-schedule, a routine adolescent booster dose of Tdap should be administered at no younger than 11 years of age.

To align with current guidelines, the Virginia General Assembly passed legislation effective July 1, 2019, that changes the grade in which students are evaluated for receipt of the Tdap vaccine from sixth to seventh grade.