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            <figure class="pb-caption">Authorities have confirmed a dozen cases of Zika virus in the United States. Here's what you need to know. (The Washington Post) </figure>

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                <p>One of the biggest problems in researching the possible link between Zika and cases of birth defects has to do with the widespread presence of dengue disease in the countries with high Zika infection, said Lyle Petersen, director of CDC’s vector-borne d