The power of collaboration: the untold story of World Blood Donor Day and World Patient Safety Day.

Global health days endorsed by the World Health Assembly (WHA) play a distinctive role in elevating priority issues, mobilizing political commitment, and catalyzing collective action. Among them, World Blood Donor Day (WBDD) and World Patient Safety Day (WPSD) stand out as landmark initiatives that emerged not only from technical necessity but also through sustained collaboration among Member States, WHO, and key partners including international organizations, professional bodies, civil society, and advocates. More than symbolic observances, they serve as governance instruments that confer legitimacy, engage stakeholders, and sustain momentum for health system strengthening. WBDD and WPSD have become influential global platforms for advancing safety, solidarity, and health system action. Yet the processes behind their establishment, including the consultations, negotiations, consensus building, and collaborative efforts that culminated in their adoption through WHA resolutions, remain largely undocumented. In this story, I offer a first-hand account of how these two global health days were conceived, negotiated, and established, drawing on more than two decades of leadership and programme coordination in blood safety (2000-2014) and patient safety (2014-2024) at WHO headquarters in Geneva, Switzerland. The article examines collaboration as the critical enabler of success and distils lessons for global health governance. While both initiatives involved extensive contributions from Member States, WHO, international organizations, professional bodies, civil society, and advocates, this article covers their development trajectory and highlights the strategies that transformed evidence, ambition, and shared purpose into global commitments.