<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31408988</termId><termName>HIV</termName><termType>PT</termType><termNote><![CDATA[ General non-taxonomic and historical term referring to the virus thought to cause AIDS. Since 1991, HIV was no longer considered an official species name; instead, two species were designated HIV-1 and HIV-2. The geographical, biological, and chronological origins of the viruses have been debated since the discovery of AIDS as an emerging disease in 1981. ]]></termNote><termCreatedDate>2026-03-30 20:49:57</termCreatedDate><relation><relationType>UF</relationType><termId>31408989</termId><termName>Human Immunodeficiency Virus</termName><termType>ND</termType></relation><relation><relationType>BT</relationType><termId>31370229</termId><termName>Lentivirus</termName><termType>PT</termType></relation><relation><relationType>NT</relationType><termId>31408990</termId><termName>Human immunodeficiency virus 1</termName><termType>PT</termType></relation><relation><relationType>NT</relationType><termId>31408992</termId><termName>Human immunodeficiency virus 2</termName><termType>PT</termType></relation></term>  </Zthes>