<mxfile host="app.diagrams.net" agent="tch-process-diagram" version="24.0.0"><diagram id="fig-01-hbsag-screening-and-confirmatory-referral" name="Figure 1 — HBsAg rapid screening, duplicate retest, and confirmatory referral algorithm"><mxGraphModel dx="1000" dy="700" grid="1" gridSize="10" guides="1" tooltips="1" connect="1" arrows="1" fold="1" page="1" pageScale="1" pageWidth="1000" pageHeight="1434" math="0" shadow="0"><root><mxCell id="0"/><mxCell id="1" parent="0"/><mxCell id="title" value="Figure 1 — HBsAg rapid screening, duplicate retest, and confirmatory referral algorithm" style="text;html=1;fontSize=20;fontStyle=1;align=left;verticalAlign=top;whiteSpace=wrap;fontFamily=Segoe UI;fontColor=#0F172A;" vertex="1" parent="1"><mxGeometry x="36" y="20" width="940" height="36" as="geometry"/></mxCell><mxCell id="lane_mt" value="Medical Technologists" style="swimlane;horizontal=1;startSize=36;html=1;whiteSpace=wrap;fontStyle=1;fontSize=12;fontFamily=Segoe 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color=&quot;#2E7D32&quot;&gt;5.3&lt;/font&gt;&lt;/b&gt;&lt;br&gt;Control line C present and visible?" style="shape=hexagon;perimeter=hexagonPerimeter2;fixedSize=1;size=18;fillColor=#E0F3E2;fontColor=#0F172A;html=1;whiteSpace=wrap;fontSize=12;fontFamily=Segoe UI;shadow=1;strokeWidth=1.5;strokeColor=#2E7D32;" vertex="1" parent="lane_mt"><mxGeometry x="7" y="384" width="284" height="44" as="geometry"/></mxCell><mxCell id="n4" value="&lt;b&gt;&lt;font color=&quot;#2E7D32&quot;&gt;5.3&lt;/font&gt;&lt;/b&gt;&lt;br&gt;Test invalid; repeat with a fresh cassette; if repeat also invalid, quarantine kit lot and log nonconformance" style="rounded=1;arcSize=14;fillColor=#FFFFFF;fontColor=#1E293B;html=1;whiteSpace=wrap;fontSize=12;fontFamily=Segoe UI;shadow=1;strokeWidth=1.5;strokeColor=#2E7D32;" vertex="1" parent="lane_mt"><mxGeometry x="310" y="480" width="274" height="74" as="geometry"/></mxCell><mxCell id="d2" value="&lt;b&gt;&lt;font color=&quot;#2E7D32&quot;&gt;5.3&lt;/font&gt;&lt;/b&gt;&lt;br&gt;Test line T visible (reactive or faint)?" style="shape=hexagon;perimeter=hexagonPerimeter2;fixedSize=1;size=18;fillColor=#E0F3E2;fontColor=#0F172A;html=1;whiteSpace=wrap;fontSize=12;fontFamily=Segoe UI;shadow=1;strokeWidth=1.5;strokeColor=#2E7D32;" vertex="1" parent="lane_mt"><mxGeometry x="7" y="495" width="284" height="44" as="geometry"/></mxCell><mxCell id="n5" value="&lt;b&gt;&lt;font color=&quot;#2E7D32&quot;&gt;5.7.1&lt;/font&gt;&lt;/b&gt;&lt;br&gt;Report Non-Reactive for Hepatitis B Surface Antigen HBsAg" style="rounded=1;arcSize=14;fillColor=#FFFFFF;fontColor=#1E293B;html=1;whiteSpace=wrap;fontSize=12;fontFamily=Segoe UI;shadow=1;strokeWidth=1.5;strokeColor=#2E7D32;" vertex="1" parent="lane_mt"><mxGeometry x="12" y="606" width="274" height="58" as="geometry"/></mxCell><mxCell id="n6" value="&lt;b&gt;&lt;font color=&quot;#2E7D32&quot;&gt;5.7.2&lt;/font&gt;&lt;/b&gt;&lt;br&gt;Retest initial reactive in duplicate using fresh cassettes from original tube" style="rounded=1;arcSize=14;fillColor=#FFFFFF;fontColor=#1E293B;html=1;whiteSpace=wrap;fontSize=12;fontFamily=Segoe UI;shadow=1;strokeWidth=1.5;strokeColor=#2E7D32;" vertex="1" parent="lane_mt"><mxGeometry x="310" y="606" width="274" height="58" as="geometry"/></mxCell><mxCell id="d3" value="&lt;b&gt;&lt;font color=&quot;#2E7D32&quot;&gt;5.7.2&lt;/font&gt;&lt;/b&gt;&lt;br&gt;Either or both duplicate retests reactive?" style="shape=hexagon;perimeter=hexagonPerimeter2;fixedSize=1;size=18;fillColor=#E0F3E2;fontColor=#0F172A;html=1;whiteSpace=wrap;fontSize=12;fontFamily=Segoe UI;shadow=1;strokeWidth=1.5;strokeColor=#2E7D32;" vertex="1" parent="lane_mt"><mxGeometry x="305" y="715" width="284" height="44" as="geometry"/></mxCell><mxCell id="n7" value="&lt;b&gt;&lt;font color=&quot;#2E7D32&quot;&gt;5.7.2&lt;/font&gt;&lt;/b&gt;&lt;br&gt;Report preliminary result Reactive and log in the External Referral Logbook" 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