Zika Virus Spreads to New Areas — Region of the Americas, May 2015–January 2016

• Published in: MMWR. Morbidity and mortality weekly report Vol. 65; no. 3; pp. 55 - 58
• Main Authors: Hennessey, Morgan, Fischer, Marc, Staples, J. Erin
• Format: Journal Article Newsletter
• Language: English
• Published: United States Center for Surveillance, Epidemiology, and Laboratory Services, Centers for Disease Control and Prevention (CDC), U.S. Department of Health and Human Services 29.01.2016; U.S. Government Printing Office
• Subjects: Americas - epidemiology; Female; Flavivirus; Humans; Population Surveillance; Pregnancy; Pregnancy Complications, Infectious - diagnosis; Pregnancy Complications, Infectious - epidemiology; Pregnancy Complications, Infectious - prevention & control; Public health; Travel; United States - epidemiology; Virus diseases; Zika virus; Zika Virus Infection - diagnosis; Zika Virus Infection - epidemiology; Zika Virus Infection - prevention & control; Americas; United States; Brazil
• ISSN: 0149-2195; 1545-861X; 1545-861X
• DOI: 10.15585/mmwr.mm6503e1

Zika virus is a mosquito-borne flavivirus that was first identified in Uganda in 1947 (1). Before 2007, only sporadic human disease cases were reported from countries in Africa and Asia. In 2007, the first documented outbreak of Zika virus disease was reported in Yap State, Federated States of Micronesia; 73% of the population aged ≥3 years is estimated to have been infected (2). Subsequent outbreaks occurred in Southeast Asia and the Western Pacific (3). In May 2015, the World Health Organization reported the first local transmission of Zika virus in the Region of the Americas (Americas), with autochthonous cases identified in Brazil (4). In December, the Ministry of Health estimated that 440,000-1,300,000 suspected cases of Zika virus disease had occurred in Brazil in 2015 (5). By January 20, 2016, locally-transmitted cases had been reported to the Pan American Health Organization from Puerto Rico and 19 other countries or territories in the Americas* (Figure) (6). Further spread to other countries in the region is being monitored closely.