Two confirmed cases of yellow fever, including one death, have been reported in Liberia as of April 25. Both cases were in Zuotuo, in Tappita district. Liberia, with technical assistance from WHO, has initiated a reactive mass vaccination campaign in Tappita that it plans to extend to neighboring districts. 

Argentina has reported five confirmed human cases and one monkey case of yellow fever in 2008, including one human death, as of March 26. The cases were all in the Misiones Province, which borders Brazil and Paraguay. Health officials in Argentina are increasing vaccination in surrounding areas and specific risk areas. Since late 2007, emerging yellow fever has been reported in monkeys and humans from many South American countries. 

The Centers for Disease Control and Prevention recommends yellow fever vaccination for travelers older than 9 months who are going to Liberia, affected parts of Argentina, and other countries. See http://wwwn.cdc.gov/travel/default.aspx.

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