WhatisFelineImmunodeficiencyVirus?什么是猫免疫缺陷病毒（FIV）？Virologistsclassifyfelineimmunodeficiencyvirus(FIV)asalentivirus(orslowvirus).FIVisinthesameretrovirusfamilyasfelineleukemiavirus(FeLV),butthevirusesdifferinmanywaysincludingtheirshape.FIViselongated,whileFeLVismorecircular.Thetwovirusesarealsoquitedifferentgenetically,andtheproteinsthat
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