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It may sound bizarre, but researchers are planning just such a study — this winter, when mosquitoes aren’t biting — to help speed development of much-needed Zika vaccines.
The quest for a vaccine began less than a year ago as Brazil’s massive outbreak revealed that Zika, once dismissed as a nuisance virus, can harm a foetus’ brain if a woman is infected during pregnancy.
Now, researchers in the United States have begun safety testing of two vaccine candidates, and more experimental shots are poised to enter that preliminary testing soon. Any that seem promising will have to be tested in thousands of people in parts of Latin America and the Caribbean that are hard-hit by the mosquito-borne virus — the only way to prove if an experimental vaccine really protects.
Even if all goes well, a vaccine wouldn’t be available for general use any time soon.
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