Vaccines are the only public health tool capable of preventing the majority of serious Hib disease. Hib vaccines are safe and efficacious even when administered in early infancy. In view of their demonstrated safety and efficacy, WHO recommends that Hib conjugate vaccines to be included in all routine infant immunization programmes. This website provides the latest summary information available to WHO about progress with decision-making and implementation of Hib vaccine introduction. It also presents estimates of disease burden reduction and indicators of programmatic implementation, including the development of surveillance networks to monitor progress at country level, and types of products used.