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The global eradication of smallpox. Final report of the Global Commission for the Certification of Smallpox Eradication, Geneva, December 1979.
Geneva, Switzerland, WHO, 1980. 122 p. (History of International Public Health No. 4)The Global Commission for the Certification of Smallpox Eradication met in December 1978 to review the program in detail and to advise on subsequent activities and met again in December 1979 to assess progress and to make the final recommendations that are presented in this report. Additionally, the report contains a summary account of the history of smallpox, the clinical, epidemiological, and virological features of the disease, the efforts to control and eradicate smallpox prior to 1966, and an account of the intensified program during the 1967-79 period. The report describes the procedures used for the certification of eradication along with the findings of 21 different international commissions that visited and reviewed programs in 61 countries. These findings provide the basis for the Commission's conclusion that the global eradication of smallpox has been achieved. The Commission also concluded that there is no evidence that smallpox will return as an endemic disease. The overall development and coordination of the intensified program were carried out by a smallpox unit established at the World Health Organization (WHO) headquarters in Geneva, which worked closely with WHO staff at regional offices and, through them, with national staff and WHO advisers at the country level. Earlier programs had been based on a mass vaccination strategy. The intensified campaign called for programs designed to vaccinate at least 80% of the population within a 2-3 year period. During this time, reporting systems and surveillance activities were to be developed that would permit detection and elimination of the remaining foci of the disease. Support was sought and obtained from many different governments and agencies. The progression of the eradication program can be divided into 3 phases: the period between 1967-72 when eradication was achieved in most African countries, Indonesia, and South America; the 1973-75 period when major efforts focused on the countries of the Indian subcontinent; and the 1975-77 period when the goal of eradication was realized in the Horn of Africa. Global Commission recommendations for WHO policy in the post-eradication era include: the discontinuation of smallpox vaccination; continuing surveillance of monkey pox in West and Central Africa; supervision of the stocks and use of variola virus in laboratories; a policy of insurance against the return of the disease that includes thorough investigation of reports of suspected smallpox; the maintenance of an international reserve of freeze-dried vaccine under WHO control; and measures designed to ensure that laboratory and epidemiological expertise in human poxvirus infections should not be dissipated.
In: Wood C, Rue Y, ed. Health policies in developing countries. London, England, The Royal Society of Medicine, 1980. 167-72. (Royal Society of Medicine. International Congress and Symposium Series; No. 24)Research is the tool which can help accelerate control of filariasis including the most important, river blindness and elephantiasis. The principles for control include eliminating the vectors and changing the way of life of the people. However these methods do not take into account the different ecologies of the land, cultures of the people and technical and political differences of the endemic areas. The WHO Onchocerciasis Control Program in the Volta Basin has been highly successful, but reinvasion of vectors is possible and there is concern that unacceptable levels of pollution will occur. Several successful limited programs of control are cited, but the absence of suitable drugs to kill the parasites is evident. One of the areas of research is centering on the characterization of the parasites and their vectors. More studies of isoenzyme markers are needed to distinguish different species of filarial parasites. An important advance in the diagnosis of filariasis has been the application of membrane filtration techniques for detecting light infection. Some of the current vector research is noted. This is particularly important because the main vectors of filariasis in Africa are also the main vectors of malaria. WHO is encouraged to stimulate collaborative research in this area. Chemotherapy is currently the most encouraging aspect of research. WHO is supporting 4 major centers where old and new filaricides are being evaluated. Some experiments are indicating the possibility that resistance to the disease can be stimulated by using irradiated larvae as appear in a cat model. Testing is now underway in a bovine onchocerciasis model. The new laboratory developments must continue so they can be applied clinically.