I'm amazed that TFS says HIV as well as the first link. TFNA (The Fucking Nature Article) title is "AAV-expressed eCD4-Ig provides durable protection from multiple SHIV challenges". Wow, SHIV is right there in the title. Humans can be infected with "human immunodeficiency virus". Simians can be infected with "simian immunodeficiency virus".
Additionally, plenty of "monkeys" get SIV and don't become symptomatic because they're natural hosts. Rhesus macaques (as stated in the Nature article), however, are not natural hosts and do become symptomatic. Just using the over-arching term "monkey" is ridiculous for a "science" blog.