Zika situation report
21 April 2016
Zika virus, Microcephaly and Guillain-Barré syndrome
From 1 January 2007 to 20 April 2016, Zika virus transmission was documented in a total of 66 countries and territories.
- 42 countries are experiencing a first outbreak of Zika virus since 2015, with no previous evidence of circulation, and with ongoing transmission by mosquitos.
- 17 countries have reported evidence of Zika virus transmission prior to 2015, with or without ongoing transmission or have reported an outbreak since 2015 that is now over.
- Eight countries have now reported evidence of person-to-person transmission of Zika virus, other than mosquito-borne transmission (Argentina, Chile, France, Italy, New Zealand, Peru, Portugal and the United States of America).
In the week to 20 April, no additional countries have reported mosquito-borne Zika virus transmission. Peru and Portugal are the latest countries to report person-to-person transmission.
Microcephaly and other fetal malformations potentially associated with Zika virus infection or suggestive of congenital infection have been reported in six countries (Brazil, Cabo Verde, Colombia, French Polynesia, Martinique and Panama). Two cases, each linked to a stay in Brazil, were detected in Slovenia and the United States of America. A further case, linked to a brief stay in Mexico, Guatemala and Belize, was detected in a pregnant woman in the United States of America.