How to set the agenda for hepatitis C: a theory-driven policy analysis.

The case of HCV in Switzerland shows that evidence alone is not enough to bring about health policy changes. A policy entrepreneur is needed who overcomes resistance, brings together the three streams-problem, policy and political-and exploits the window of opportunity at the right time. To be successful, the policy entrepreneur must identify the indicators that map the problem, network and convince decision-makers, recognize policy windows and use them-as has been the case with HCV in Switzerland.