| Up to this point in time my focus has been mainly on South Africa, a country with one of the highest HIV prevalences and where approximately one in three pregnant women are HIV-positive. |
| The highest prevalences of FAS and FASD worldwide have been reported among first-grade children in South Africa. |
| Many, mainly rural, areas had prevalences well below one per 1,000, but cases were found in all local authorities in England and Wales. |
| Because of the low efficacy of sampling protocols to detect low prevalences of non-compliance, other assurance mechanisms are more important where a low prevalence of non-compliance is expected. |
| The result is that higher prevalences from these studies might be misinterpreted as representative of Aboriginal communities in general when in reality there is substantial variation and diversity. |
| Hence, for calculating the variance of the health expectancy only the uncertainty in the prevalences were used. |
