From “ONE in FIVE” to “NONE of FIVE”: why do we need to focus on data?


The lack of effective prevention policies remains the main challenge to the elimination of sexual violence against children. Not knowing the real extent of sexual violence due to a lack of reliable data has resulted in poor prevention strategies.

Because most people underestimate the extent of the problem, the Council of Europe ONE in FIVE campaign uses an estimate as an effective base-line study tool to motivate governments, parliaments, child professionals and parents to take the urgent action needed to prevent sexual violence, protect children and prosecute offenders.

Effective prevention policies also depend on the accuracy and quality of data. This is why Council of Europe Convention on the Protection of Children against Sexual Exploitation and Sexual Abuse (Lanzarote Convention) requires countries to set up “mechanisms for data collection or focal points, at national or local levels and in collaboration with civil society, for the purpose of observing and evaluating the phenomenon sexual exploitation and sexual abuse of children, with due respect for the requirements of personal data protection" (Article 10).

One of the specific aims of the Council of Europe's ONE in FIVE campaign is to push countries to finance research on the extent of sexual violence so that they can adapt their prevention and protection policies accordingly. The ultimate goal is clearly to reach a “None of Five” figure.