The Convention urges States parties to “ensure that no child is deprived of his or her right of access to such health care services.” Some studies show that children living in informal urban settlements are particularly vulnerable.4 High urban child mortality rates tend to be seen in places where significant concentrations of extreme poverty combine with inadequate services, as in slums. Throughout history, urban life, so concentrated with humanity, has been a catalyst for trade, ideas and opportunities, making cities engines of economic growth.