></p>
</blockquote>
<p>MDRI is defined as the average time alive and returning a ‘recent’ result, while infected for times less than <span class="math inline">\(T\)</span>. FRR is defined as a cross sectional context specific proportion of subjects returning a ‘recent’ result while infected for longer than <span class="math inline">\(T\)</span>.</p>
<p>Test performance may be context-specific, and therefore, where available, local data should be used to calibrate tests. Often cross-sectional inciden