Which agency has developed a plan to address the issue of underimmunized children?

The agency that has developed a plan to address the issue of under immunized children is the World Health Organization who provides and have a concerned to all children who were under immunized and that was given a budget for the health condition of the children. 

An informal structure in a bureaucracy would be something like so-called "office politics". where there's a formal structure set up for the organization, but then an informal subculture as well that has a way of organizing the bureaucracy further. this can be positive because it sets up an added degree of organization, albeit informal, within the bureaucracy.