CARL AZUZ, CNN STUDENT NEWS ANCHOR: Great to see you this Wednesday. I`m Carl Azuz, covering current events on CNN STUDENT NEWS.
Got an update on the U.S. presidential race coming up in a few minutes. But we`re starting with news from the World Health Organization.
The medical branch of the United Nations has declared an international public health emergency, and (Q1)it`s because of the lightning fast spread of the Zika virus. The emergency declaration has hoped to speed up international cooperation in research in fighting the virus.
(Q2)What`s interesting about Zika is that unlike some other viruses spread by mosquitoes. So, think malaria痢疾and dengue登革热 fever. Doctors say Zika is not a clinically serious infection to many people
（Q3）but it`s been linked to an alarming increased in babies born with microcephaly头小畸型. A condition that causes them to have abnormally small heads and serious developmental problems.
Zika cases have increased in Brazil and French Polynesia. But to explore the history of the virus, you have to go to East Africa.
(BEGIN VIDEOTAPE)
DAVID MCKENZIE, CNN INTERNATIONAL CORRESPONDENT (voice-over): Armed with traps, scientists push into the Zika forest in Uganda.
They discovered around 70 types of mosquito here, some carrying deadly viruses.
(on camera): This is a very precarious危险的; 不确定的; climb up this tower for me to get high up to try to get the different species of mosquitoes.
(voice-over): We`re in an ecological 生态（学）的 hot zone, where (INAUDIBLE) disease thrive.
(on camera): So, it`s got a light to attract the mosquitoes and carbon dioxide coming up the dry ice and we should get some overnight.
UNIDENTIFIED MALE: Yes.
MCKENZIE (voice-over): And they do. Mosquitoes that could be carrying yellow fever, dengue, and yes, the Zika virus.
（Q4）The forest gave the virus its name. （Q 5）Back in 1947, scientists discovered Zika by accident, while studying yellow fever. Their research station is still here.
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