Data in the report, Global accelerated action for the health of adolescents (AA-HA!): Guidance to support country implementation, reveal stark differences in causes of death when separating the adolescent group by age (younger adolescents aged 10–14 years and older ones aged 15–19 years) and by sex. The report also includes the range of interventions – from seat-belt laws to comprehensive sexuality education – that countries can take to improve their health and well-being and dramatically cut unnecessary deaths.