DDT usage is banned in all countries with exceptions noted in which regions?

DDT, or dichloro-diphenyl-trichloroethane, is a pesticide that has been widely banned due to its harmful environmental and health effects. However, exceptions to the ban do exist, particularly in certain regions where it may still be used under specific circumstances, such as for disease vector control, including malaria.

Parts of Africa have been noted for their continued use of DDT in the fight against malaria, especially in sectors where the disease is endemic and where effective alternatives are limited. The World Health Organization has provided guidelines permitting the use of DDT for indoor residual spraying in malaria control programs, acknowledging its effectiveness in reducing transmission rates in these areas.

Sweden is mentioned in context of DDT as it was one of the countries that initially used it extensively; however, the general context of exceptions pertains more to specific areas in Africa rather than broader applications. Thus, the fact that Southern Africa and other regions are allowed to use DDT under expert guideline supervision makes the assertion about Parts of Africa and Sweden most accurate in relation to those exceptions.

Other regions listed in the options do not have such allowances recognized; thus, they are not the correct choice.