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WHO says Zika virus spreads explosively, 4 million cases forecast
Published in The Saudi Gazette on 29 - 01 - 2016

* Zika linked to babies born with abnormally small heads
* WHO: virus could infect 3-4 million people in Americas
* Chan calls emergency meeting of experts for Monday
* WHO criticised last year over response to Ebola virus
Tom Miles and Stephanie Nebehay
GENEVA - The Zika virus, linked to severe birth defects in thousands of babies in Brazil, is "spreading explosively" and could infect as many as 4 million people in the Americas, the World Health Organization (WHO) said on Thursday.
Director-General Margaret Chan told members of the U.N. health agency's executive board the spread of the mosquito-borne disease had gone from a mild threat to one of alarming proportions. The WHO would convene an emergency meeting on Monday to help determine its response, she said.
"The level of alarm is extremely high," Chan told the Geneva gathering. "Last year, the virus was detected in the Americas, where it is now spreading explosively. As of today, cases have been reported in 23 countries and territories in the region," Chan said, promising quick action from the WHO.
The agency was criticized last year for reacting too slowly to West Africa's Ebola epidemic, which killed more than 10,000 people, and it promised to cut its response time.
"We are not going to wait for the science to tell us there is a link (with birth defects). We need to take actions now," Chan said, referring to the condition called microcephaly in which babies are born with abnormally small heads and brains that have not developed properly.
There is no vaccine or treatment for Zika, which is like dengue and causes mild fever, rash and red eyes. An estimated 80 percent of people infected have no symptoms. Much of the effort against the illness focuses on protecting people from mosquitoes and reducing mosquito populations.
Developing a safe and effective vaccine could take a year, WHO Assistant Director Bruce Aylward said, and it would take six to nine months just to confirm whether Zika is the actual cause of the birth defects, or if the two are just associated.
"In the area of vaccines, I do know that there has been some work done by some groups looking at the feasibility of a Zika virus vaccine. Now something like that, as people know, is going to be a 12-month-plus time frame," he said.
U.S. health officials said the United States has two potential candidates for a Zika vaccine and may begin human clinical trials by the end of this year, but there will not be a widely available vaccine for several years.
Marcos Espinal, head of communicable diseases at the Pan American Health Organization, the WHO's Americas arm, forecast 3 to 4 million Zika cases in the Americas.
As the virus spreads from Brazil, other countries in the Americas are likely to see cases of babies with Zika-linked birth defects, according to Carissa Etienne, regional director for the Pan American Health Organization.
Brazil has reported around 4,000 suspected cases of microcephaly, vastly more than in an average year and equivalent to 1 to 2 percent of all newborns in the state of Pernambuco, one of the worst-hit areas.
The WHO's Chan said that while a direct causal relationship between Zika virus infection and birth malformations has not yet been established, it is strongly suspected.
"The possible links, only recently suspected, have rapidly changed the risk profile of Zika from a mild threat to one of alarming proportions," she said.
Health and law expert Lawrence Gostin of Georgetown University in Washington, who had urged the WHO to act, welcomed Chan's decision to convene an expert meeting, calling it "a critical first step in recognising the seriousness of an emerging epidemic."


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