Zika virus is international health emergency, says WHO
Geneva, February 1 — After summarizing the report of emergency committee on Zika virus, the World Health Organization Director-General Margaret Chan has declared the situation of a Public Health Emergency of International Concern.
The first meeting of the Emergency Committee (EC) convened by the Director-General under the International Health Regulations (2005) (IHR 2005) regarding clusters of microcephaly cases and other neurologic disorders in some areas affected by Zika virus was held by teleconference on 1 February.
The WHO Secretariat briefed the Committee on the clusters of microcephaly and Guillain-Barré Syndrome (GBS) that have been temporally associated with Zika virus transmission in some settings. The Committee was provided with additional data on the current understanding of the history of Zika virus, its spread, clinical presentation and epidemiology.
The following States Parties provided information on a potential association between microcephaly and/or neurological disorders and Zika virus disease: Brazil, France, United States of America, and El Salvador.
Following the meeting DG Chan told journalists that, “I convened an Emergency Committee, under the International Health Regulations, to gather advice on the severity of the health threat associated with the continuing spread of Zika virus disease in Latin America and the Caribbean.
The members of the committee agreed that the situation meets the conditions for a Public Health Emergency of International Concern. I have accepted this advice.
I am now declaring that the recent cluster of microcephaly cases and other neurological disorders reported in Brazil, following a similar cluster in French Polynesia in 2014, constitutes a Public Health Emergency of International Concern,” She said.
She stated that, “In assessing the level of threat, the 18 experts and advisers looked in particular at the strong association, in time and place, between infection with the Zika virus and a rise in detected cases of congenital malformations and neurological complications.
The experts agreed that a causal relationship between Zika infection during pregnancy and microcephaly is strongly suspected, though not yet scientifically proven. All agreed on the urgent need to coordinate international efforts to investigate and understand this relationship better.
The experts also considered patterns of recent spread and the broad geographical distribution of mosquito species that can transmit the virus.
The lack of vaccines and rapid and reliable diagnostic tests, and the absence of population immunity in newly affected countries were cited as further causes for concern.
After a review of the evidence, the Committee advised that the recent cluster of microcephaly cases and other neurological disorders reported in Brazil, following a similar cluster in French Polynesia in 2014, constitutes an “extraordinary event” and a public health threat to other parts of the world.
In their view, a coordinated international response is needed to minimize the threat in affected countries and reduce the risk of further international spread.
A coordinated international response is needed to improve surveillance, the detection of infections, congenital malformations, and neurological complications, to intensify the control of mosquito populations, and to expedite the development of diagnostic tests and vaccines to protect people at risk, especially during pregnancy.
The Committee found no public health justification for restrictions on travel or trade to prevent the spread of Zika virus.
At present, the most important protective measures are the control of mosquito populations and the prevention of mosquito bites in at-risk individuals, especially pregnant women, Chan added.