 that this is a rare
disease, striking only 1 in 100,000 people of your age. Why is it good
news that the disease is rare? What are the chances that you actually
have the disease?
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  </div>
  <div class="card">
    <div class="card-header p-2">
        <a href='#' class="p-2">Exercise 13.19</a>
        <a class="bookmarkquest" id="bookmark_question">
          <button type="button" class="btn btn-dark float-right" title="Bookmark Exercise" onclick="bookmark('ch13ex19');" href="#">
            <i id="