“…Non-human primate (NHP) models challenged with simian immunodeficiency virus (SIV) and simian-human immunodeficiency virus (SHIV) have been used to study possible vaccine targets [18]. The SIVs are retroviruses found in non-human primates [19,20]. When SIV infects species other than their natural hosts, such as the SIV of sooty mangabeys infection of rhesus macaques, simian acquired immunodeficiency syndrome develops [19,21].…”