
<div id="introduction" class="section level2">
<h2 class="hasAnchor">
<a href="#introduction" class="anchor"></a>Introduction</h2>
<p>Incidence estimates from cross-sectional surveys using biomarkers for ‘recent infection’ require that the test for recent infection (usually an adapted diagnostic assay) be accurately characterised. The two critical parameters of test performance are the Mean Duration of Recent Infection (MDRI), denoted <span class="math inline">\(\Omega_T\)</span>, (with <span class="ma