Opinion Essay Collection of opinion essays that have appeared in the newsletter of the Anti-Fraud Office of Catalonia. By subscribing to the newsletter, you will be able to obtain information regarding the actions of the Anti-Fraud Office and other issues related to its scope. Ethics and Public Administration Jorge F. Malem, former professor of Philosophy of Law Public ethics and transparency Òscar Roca, Prevention director of the Anti-Fraud Office of Catalonia December 9th. International Day Against Corruption Miguel Ángel Gimeno, director of the Anti-Fraud Office of Catalonia Why training in public integrity? Anabel Calvo, officer of the Anti-Fraud Prevention Directorate The paradox of transparency and its limits Jesús García, court journalist in El País Vaccines in the context of a pandemic: reflections from Bioethics Núria Terribas i Sala, director of the Víctor Grifols i Lucas Foundation and of the UVIC-UCC Chair in Bioethics, vice-president of the Bioethics Committee of Catalonia Brief reflections on the transposition of Directive 2019/1937, concerning the protection of persons reporting infringements of Union law Silvina Bacigalupo, Professor of Criminal Law at the Autonomous University of Madrid and President of Transparency International Spain