Dan Barouch, a professor of medicine at Beth Israel Deaconess Medical Center at Harvard University and an infectious diseases specialist, says both vaccines stimulate the production of immune system antibodies that protect mice from infection by the Zika virus.
"And the protection was striking. The protection was complete,” he said. “All of the mice that received the vaccine showed no virus in the bloodstream after challenge, whereas all the mice that did not receive the vaccines became infected and had high levels of virus in the bloodstream. One of the important points is that the protection could be achieved by a single immunization."
. Brazil has been particularly hard hit by Zika. Many pregnant women who are infected with the virus give birth to babies with a congenital defect called microcephaly, which causes an abnormally small head. The children suffer from a host of problems, including intellectual disability, seizures and motor problems. The virus also has been implicated in Guillain-Barre syndrome, a paralytic illness that mostly strikes adults.
Nelson Michael, director of the military HIV program at Walter Reed Army Institute of Research in Maryland, is co-author of the Nature article.
He says the vaccines are in production now, and researchers hope to begin human trials in October.
"I would say, at this point, no one is really in a position to say if it's going to jump ahead of expanded safety studies. But I can tell you it's going to move very quickly," he said.
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