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CORRIGENDA Vol. 71, No. 3/4 (1993) of the Bulletin of the World Health Organization Importation of malaria into the USSR from Afghanistan, 1981-89 Page 385, Abstract, first line: delete falciparum, insert vivax. Page 386, left-hand column, line 6: delete USSR, insert Afghanistan. Page 387, right-hand column, line 3: delete 29, insert 28. Vol. 71, No. 6 (1993) of the Bulletin of the World Health Organization Prevalence of depigmentation of the shins: a simple and cheap way to screen for severe endemic onchocerciasis in Africa Page 756, right-hand column, Results, line 2: delete 55.4, insert 45.4; Results, line 3: delete 54.5-56, insert 44.5-46. WHO Bulletin OMS. Vol 72 1994 321