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        <p class="kicker">Health &amp; Science</p>

        <h1>Why the United States is so vulnerable to the alarming spread of Zika virus</h1>

        <p class="byline">By Lena H. Sun, Brady Dennis</p>

        <p class="date">January 27, 2016 at 5:03 PM</p>

        <amp-video width="480" height="270" src="https://videos.posttv.com/washpost-production/YouTube/World%20Health%20Organisatio