Vaccine hesitancy remains a significant public health challenge, despite vaccines being among the most effective interventions, preventing an estimated four million deaths annually. However, global vaccination rates have declined, with 2021 marking the lowest coverage in over a decade. Vaccine hesitancy is recognized as one of the top threats to global health by the World Health Organization. It is fueled by historical mistrust of the healthcare system, including unethical practices like the Tuskegee syphilis study and forced sterilization programs. Concerns about vaccine safety, adverse reactions, and allergies also contribute to hesitancy, with misconceptions surrounding additives such as thimerosal, formaldehyde, and gelatin exacerbating the issue. Addressing vaccine hesitancy requires tailored education, culturally competent communication, and accessible, evidence-based information. These efforts are essential to fostering public trust and improving vaccination uptake worldwide.