what do we know about the zika virus? the zika virus was first detected in monkeysin the zika forest of uganda in 1947. it was initially considered benign as infectionin humans was rare and only appeared to cause a mild rash and fever. durante brotes de infecciones de zika en el2007 y 2013 en islas del pacãfico, las autoridadesduring outbreaks in 2007 and 2013 in the pacificislands, health officials began to see a link to certain neurologicalconditions in human patients. by 2015, the disease had spread throughoutasia and south america, and is now linked to cases of infant microencephaly.
children born with microencephaly have amuch smaller brain and head and may experience severe mental retardation, seizuresand even death. scientists believe the virus targets a particularprotein called axl which is prevalent on the surface ofneural stem cells. the virus kills these cells as well as radial glia,which help developing neurons migrate to the outer layers of the brain. about 1 in 5 people who become infectedshow symptoms, and the virus can be transmitted throughmosquito bites, blood transfusions, sexual contact, or from mothers to their fetuses.
health officials are urging residents and travelersin zika-prone areas to take special precautions. because the best protection against the spreadof a virus is the spread of information.
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