1. Waning Immunity Research shows that antibody levels naturally decline several months after the initial vaccine. The booster helps restore strong immune protection. 2. Variants of Concern COVID-19 has mutated into multiple strains like Omicron, XBB, and newer variants. The Moderna booster dose is updated to target these changes. 3. Hospitalization and Death Prevention Studies c... https://rollbol.com/blogs/1992209/Moderna-Booster-Dose-2025-Comprehensive-Guide-to-Protection-Effectiveness-and