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Epidemiological situation

This page was last updated on 21 October 2016

Weekly summary

Since 2015, and as of 20 October 2016, there have been 69 countries and territories reporting mosquito-borne transmission of the virus. According to WHO and as of 20 October 2016, 23 countries or territories have reported microcephaly and other central nervous system (CNS) malformations in newborns potentially associated with Zika virus infection.
  • In the USA, 11 new locally-acquired cases have been reported in Florida since the last CDTR, bringing the cumulative number of locally-acquired cases to 166. 
  • On 14 October 2016, Martinique declared the Zika outbreak phase over, as only 90 cases were identified from 26 September to 2 October, compared with 1 140 weekly cases during the peak of the epidemic between 30 May and 5 June.
  • On 17 October 2016, the health authorities in Vietnam reported the first possible case of microcephaly associated with Zika in a 4-month-old child living in Krong Buk district, Dak Lak province.
  • In Trinidad and Tobago, brain abnormalities were recently detected on the ultrasounds of five unborn babies, at least four of them with Zika as the sole risk factor. Trinidad and Tobago registers approximately 12 cases of microcephaly yearly due to a variety of genetic causes.
  • On 19 October, US CDC updated guidance for pregnant women and women and men of reproductive age for Zika virus infection related to the ongoing investigation of local mosquito-borne Zika virus transmission in Miami-Dade county, Florida.
  • In the ECDC map: Fiji and Solomon Islands have been added back to the map indicating transmission in the past three months and the status of Vietnam has changed to 'widespread transmission'.

Update on number of cases

The USA 
Eleven locally-acquired cases have been recorded in Florida over the past week. To date, 166 locally-acquired and 747 imported cases of Zika have been reported in Florida. The distribution of the locally-acquired cases is as follows: 154 in Miami-Dade, five in Palm beach, one in Pinellas and one in Broward. The location of exposure for the other five cases is still under investigation.
EU/EEA imported cases:
Since July 2015 (week 26), 19 countries (Austria, Belgium, the Czech Republic, Denmark, Finland, France, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden and the United Kingdom) have reported 1 935 travel-associated Zika virus infections through The European Surveillance System (TESSy). Over the same time period, seven EU countries reported 91 Zika cases among pregnant women.
EU’s Outermost Regions and Territories
As of 20 October 2016:
Martinique: 36 590 suspected cases have been reported, an increase of 65 cases during the last week. Martinique declared the Zika outbreak phase over.
French Guiana: 9 851 suspected cases have been detected, an increase of 40 cases since the previous week. According to the regional situation report, the epidemic is over.
Guadeloupe: 30 775 suspected cases have been detected, an increase of 55 suspected cases since the previous week. The weekly number of cases has been decreasing.
St Barthélemy: 820 suspected cases have been detected, an increase of 15 suspected cases since the previous week. The weekly number of cases is stable.
St Martin: 2 670 suspected cases have been detected, an increase of 70 suspected cases since the previous week. The weekly number of cases is stable.

Since February 2016, 12 countries have reported evidence of person-to-person transmission of Zika virus, probably via a sexual route.

Update on microcephaly and/or central nervous system (CNS) malformations potentially associated with Zika virus infection

As of 20 October 2016, microcephaly and other central nervous system (CNS) malformations associated with Zika virus infection or suggestive of congenital infection have been reported by 23 countries or territories. Brazil reports the highest number of cases. Nineteen countries and territories worldwide have reported an increased incidence of Guillain-Barré syndrome (GBS) and/or laboratory confirmation of a Zika virus infection among GBS cases. 

ECDC assessment

The spread of the Zika virus in the Americas and Asia is likely to continue as the vectors (Aedes aegypti and Aedes albopictus mosquitoes) are widely distributed there. The likelihood of travel-related cases in the EU is increasing. A detailed risk assessment was published on 30 August 2016. As neither treatment nor vaccines are available, prevention is based on personal protection measures. Pregnant women should consider postponing non-essential travel to Zika-affected areas.


Countries and territories with reported confirmed autochthonous cases of Zika virus infection in the past three months, as of 14 October 2016  

Countries affected in past 3 months Areas (non-tropical countries only) Type of transmission
American Samoa   Widespread transmission
Anguilla ​Widespread transmission
Antigua and Barbuda   Widespread transmission
Barbados ​Widespread transmission
Belize ​Widespread transmission
Bolivia   Widespread transmission
Bonaire ​Widespread transmission
Brazil   Widespread transmission
Colombia   Widespread transmission
Costa Rica   Widespread transmission
Curaçao   Widespread transmission
Dominica   Widespread transmission
Dominican Republic   Widespread transmission
Ecuador ​Widespread transmission
El Salvador   Widespread transmission
Fiji   Widespread transmission
French Guiana   Widespread transmission
Grenada   Widespread transmission
Guadeloupe   Widespread transmission
Guatemala   Widespread transmission
Haiti   Widespread transmission
Honduras   Widespread transmission
Jamaica   Widespread transmission
Martinique   Widespread transmission
Mexico   Widespread transmission
Micronesia, Federated States of   Widespread transmission
Nicaragua   Widespread transmission
Panama   Widespread transmission
Paraguay   Widespread transmission
Peru   Widespread transmission
Philippines ​​Widespread transmission​
Puerto Rico   Widespread transmission
Saint Lucia   Widespread transmission
Saint Martin   Widespread transmission
Saint Vincent and the Grenadines   Widespread transmission
Saint-Barthélemy   Widespread transmission
Singapore   Widespread transmission
Sint Maarten ​Widespread transmission
Suriname   Widespread transmission
Thailand   Widespread transmission
Trinidad and Tobago   Widespread transmission
United States of America Florida (Miami-Dade county) Widespread transmission
United States of America Florida (Broward, Palm Beach and Pinellas  counties) Sporadic transmission​
US Virgin Islands   Widespread transmission
Venezuela ​​ ​Widespread transmission
Bahamas ​Sporadic transmission
British Virgin Islands (UK) ​Sporadic transmission
Cayman Islands   Sporadic transmission
Cuba ​Sporadic transmission
Malaysia ​Sporadic transmission
Maldives ​Sporadic transmission
Saba   Sporadic transmission
Saint Kitts and Nevis ​Sporadic transmission
Sint Eustatius   Sporadic transmission
Turks and Caicos Islands   Sporadic transmission

The classification of countries above is based on: 1) number of reported autochthonous confirmed cases; 2) number of countries who report a zika virus transmission or a country’s transmission status changes; 3) duration of the circulation.  

Countries or territories with reported confirmed autochthonous cases of Zika virus infection in the past three months, as of 21 October 2016



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