ZIKABRA Study Team (in alphabetical order): Abreu, André Luiz de (General Coordination of Public Health Laboratories (CGLAB/DAEVS/SVS/MS), Brasília-DF, Brazil); Bermudez, Ximena Pamela Diaz (Department of Public Health, University of Brasília, Brasília-DF, Brazil); Bôtto-Menezes, Camila Helena Aguiar (Department of Malaria, Tropical Medicine Foundation Doctor Heitor Vieira Dourado (FMT-HVD), Manaus, Amazonas, Brazil & School of Health Sciences, Amazonas State University (UEA), Manaus, Amazonas, Brazil); Brasil, Patrícia (Acute Febrile Illnesses Laboratory, Evandro Chagas National Institute of Infectious Diseases, Oswaldo Cruz Foundation, Rio de Janeiro, Rio de Janeiro, Brazil); Brito, Carlos Alexandre Antunes (Clinical Hospital of Federal University, Department of Internal Medicine, Recife, Pernambuco, Brazil); Broutet, Nathalie Jeanne Nicole (Department of Sexual and Reproductive Health and Research, World Health Organization, Geneva, Switzerland; Evandro Chagas National Institute of Infectious Diseases, Oswaldo Cruz Foundation, Rio de Janeiro, Rio de Janeiro, Brazil); Castilho, Marcia da Costa (Department of Malaria, Tropical Medicine Foundation Doctor Heitor Vieira Dourado (FMT-HVD), Manaus, Amazonas, Brazil); Fernandes, Tatiana Jorge (Acute Febrile Illnesses Laboratory, Evandro Chagas National Institute of Infectious Diseases, Oswaldo Cruz Foundation, Rio de Janeiro, Rio de Janeiro, Brazil); Giozza, Silvana Pereira (Department of HIV/AIDS, Tuberculosis, Viral Hepatitis and Sexually Transmitted Infections, Health Surveillance Secretariat, Ministry of Health, Brazil); Habib, Ndema (Department of Sexual and Reproductive Health and Research, World Health Organization, Geneva, Switzerland); Kara, Edna Oliveira (Department of Sexual and Reproductive Health and Research, World Health Organization, Geneva, Switzerland); Lacerda, Marcus Vinicius Guimarães (Department of Malaria, Tropical Medicine Foundation Doctor Heitor Vieira Dourado (FMT-HVD), Manaus, Amazonas, Brazil & Instituto Leônidas & Maria Deane, Oswaldo Cruz Foundation, Manaus, Amazonas, Brazil); Lima, Morganna Costa (Department of Virology and Experimental Therapy, Institute Aggeu Magalhães, Oswaldo Cruz Foundation, Recife, Pernambuco, Brazil); Neto, Armando Menezes (Department of Virology and Experimental Therapy, Institute Aggeu Magalhães, Oswaldo Cruz Foundation, Recife, Pernambuco, Brazil); Pereira, Gerson Fernando (Department of HIV/AIDS, Tuberculosis, Viral Hepatitis and Sexually Transmitted Infections, Health Surveillance Secretariat, Ministry of Health, Brazil), Pimenta, Cristina (Department of HIV/AIDS, Tuberculosis, Viral Hepatitis and Sexually Transmitted Infections, Health Surveillance Secretariat, Ministry of Health, Brazil).