Climate Change2007: Impacts, Adaptation and Vulnerability: Working Group II Contribution to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change, Cambridge, UK, Cambridge University Press, 2007, pp. See box 1, below. Low-income countries can only afford to spend a small portion of their total income on health, and their populations have to cover a large share of their medical expenses out of their own pockets. These facts demonstrate that health attainments and services in developing countries remain unsatisfactory, despite successes achieved on many fronts. Table 2 shows the range of inequalities in under-five mortality rates in developing countries. In virtually every country, children born in poorer families are facing a higher probability of dying before reaching age 5.