Worldwide, immunization has been identified as one of the key interventions that can significantly reduce the incidence of illnesses, disability, and even mortality. Even though vaccines are being acknowledged as one of the major milestones in the field of public health, but their acceptance among the general population is quite variable and is always under scrutiny for different reasons. In fact, according to the recent estimates released by the World Health Organization, one in every five children worldwide fail to receive routine life-saving vaccines, and almost 1.5 children die every year because of those diseases which can be definitely prevented by the existing vaccines.