OBJECTIVE: To compare the impact of three strategies for delivering a booster dose of adult-formulated tetanus-diphtheria-pertussis (Tdap) vaccine to adolescents in Australia. These comprise: (i) administering Tdap to: a one-year age cohort; (ii) administering Tdap to the entire high school and to subsequent entrant cohorts; and (iii) administering Tdap to the entire high school but w... https://www.chiggate.com/