The Experience of an Accelerated COVID-19 Immunization Campaign in Oman: A Review Within the WHO Health System Building Blocks Framework.

Oman launched its COVID-19 vaccination campaign in December 2020, navigating significant public health challenges with resilience and adaptability. The country faced global vaccine shortages, community hesitancy to receive the vaccine, and diverse sociocultural and infrastructural obstacles. Despite these issues, Oman scaled up its COVID-19 vaccination efforts, administering over 7 million doses, covering approximately 71% of the population by mid-2022. The campaign, which operated through more than 44 vaccination centers nationwide, exemplified rapid vaccine implementation, strategic prioritization, and a coordinated pandemic response. This study examined the field experience of Oman's accelerated COVID-19 mass vaccination campaign through the World Health Organization's Health System Building Blocks framework. The key domains addressed included (1) multi-sectoral collaboration underpinned by strong governance structures; (2) the role of primary healthcare facilities as essential first responders during health crises, and safe handling of vaccination procedures; (3) transparency and active community engagement, particularly through local leaders and social media, to address vaccine hesitancy; (4) the integration of digital health information systems to ensure unified and efficient data management; (5) building a resilient healthcare workforce by enhancing vaccination capacity and mental health support; and (6) the importance of financial alternatives. Additionally, the critical role of global and regional partnerships in vaccine production and distribution was highlighted. Drawing on Oman's experience, this descriptive review offers context-specific lessons for enhancing health system preparedness and guiding effective responses to public health emergencies.