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Particular countries have even been certified to be free of both vector-borne and transfusion transmissions and others have had drastic reductions.  For the SCI countries: Uruguay was certified to be free of both transmission types in 1997, Chile in 1999 and Brazil in 2006 (Moncayo et al., 22).  Parts of Paraguay and Argentina have also reached this state.  Furthermore, as of 2000, incidence rate of infection fell on average by 94% in the Southern Cone countries and contributed to the continent-wide reduction of infection by 70% (Vines, 5).