Vaccines remain one of the most powerful tools for protecting communities against deadly diseases. Yet, unequal access, misinformation, and systemic barriers continue to widen the vaccination gap. For vulnerable groups, children, the elderly, people with chronic illnesses, and marginalized communitiesthis gap is more than a statistic; it is a matter of survival. This edition, explores the roots of the gap, its human impact, and the urgent need for inclusive strategies that ensure no one is left behind.