Zika virus and complications

Situation update

20 October 2016 -- Overall, the global risk assessment has not changed. Seventy-three countries and territories have reported evidence of mosquito-borne Zika virus transmission since 2007, with 67 reports from 2015 onwards. The risk of Zika-associated complications in countries thought to be endemic for Zika virus remains largely unknown, requiring additional research.

Prevention of sexual transmission of Zika virus

6 September 2016 -- The interim guidance on prevention of sexual transmission of Zika virus has been updated with new evidence and advice.

The primary transmission route of Zika virus is via the Aedes mosquito. However, mounting evidence has shown that sexual transmission of Zika virus is possible and more common than previously assumed. This is of concern due to an association between Zika virus infection and adverse pregnancy and fetal outcomes, including microcephaly, neurological complications and Guillain-Barré syndrome.


Emergency Committee on microcephaly, other neurological disorders and Zika virus

2 September 2016 -- The fourth meeting of the Emergency Committee (EC) on Zika and microcephaly convened by the Director-General under the International Health Regulations (2005) regarding microcephaly, other neurological disorders and Zika virus was on 1 September 2016. The Committee agreed that Zika virus infection and its associated congenital and other neurological disorders continues to be a Public Health Emergency of International Concern (PHEIC).


Mapping social science research for Zika virus response

29 August 2016 -- Social science research is an essential part of effective risk communication and community engagement for responding effectively to the ongoing Zika outbreak, as it is the case for any epidemic or pandemic. This interactive map allows you to gain an overview of such research to input into the response.

Knowledge Attitudes and Practice (KAP) surveys and other social science research allows responders to rapidly obtain valuable and insightful information in order to tailor interventions to better address people's needs at community level, thereby contributing to the overall public health response to Zika virus and its potential complications.


Dispelling rumours around Zika and complications

18 August 2016 - Zika virus and the complications it can cause have given rise to questions and concerns in affected communities and globally. As we continue to learn more about the disease, rumours can emerge. WHO continues to update the public regularly, with the most current scientific evidence, to ensure that people are well informed on public health issues and to stop rumours from circulating.

Eliminate Dengue Brazil

fact buffet

Public health emergency

1 Feb 2016WHO declared the cluster of microcephaly cases and other neurological disorders a health emergency.

First Zika Emergency Committee

Situation report

67 countriesSince 2015, 67 countries and territories reported evidence of vector-borne Zika virus transmission.

Situation report

Global response

60 partnersMore than 60 global and local partners are participating in the Zika virus response.

Strategic Response Plan

Zika virus and complications

Zika virus

Guillain–Barré syndrome


Research and development

Zika: mapping the emerging evidence

WHO has compiled a list of freely-accessible external scientific resources relevant to Zika virus in the interest of promoting research and development

The history of Zika virus

The history of Zika virus timeline and article summarize the spread of Zika infection from the earliest discovery in 1947 to 2016. Zika virus infection appears to have changed in character while expanding its geographical range.

Zika virus quiz

Quiz on Zika virus

What can you do to you protect yourself?
Can Zika virus be transmitted through sex?
Can women transmit Zika virus to their fetuses during pregnancy or childbirth?
Find the answer to these questions and more by taking the Zika virus quiz.