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. 2015 Dec;21(12):2274–2276. doi: 10.3201/eid2112.151167

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Reported cases of indeterminate acute exanthematous illness and suspected dengue fever in Salvador, Brazil, by date of medical care, February 15−June 25, 2015. Letters indicate specific events. A) February 15: systematic reporting of cases of acute exanthematous illness of unknown cause begins in Salvador. B) April 13: Salvador Epidemiologic Surveillance Office releases its first epidemiologic alert about the outbreak in Salvador. C) April 29: Zika virus is confirmed in 8 samples from patients residing ≈50 km from Salvador (http://portalsaude.saude.gov.br/index.php/situacao-epidemiologica-dados-dengue-2) and media coverage of the outbreak intensifies (http://www.correio24horas.com.br/detalhe/noticia/doenca-misteriosa-que-atinge-cidades-baianas-e-identificada-como-zika-virus/?cHash = 74792c41f3128395ba0ffa5e1ed9dbbe). D) May 14: Brazilian Ministry of Health announces circulation of Zika virus in Brazil (http://portalsaude.saude.gov.br/index.php/o-ministerio/principal/secretarias/svs/noticias-svs/17702-confirmacao-do-zika-virus-no-brasil). E) June 11: Brazilian press announces that cases of Zika virus infection have been confirmed in 8 states in Brazil (http://www1.folha.uol.com.br/cotidiano/2015/06/1640752-virus-primo-da-dengue-zika-ja-tem-casos-confirmados-em-oito-estados.shtml).