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SIVmac239 Plasma Viral Loads and CD4+ T cell decline after four serial passages. (A) SIVmac239 fourth passage plasma viral loads. Plasma viral loads peaked around 84 days post‐inoculation. (B) SIVmac239 fourth passage CD4+ T cell decline. Both data sets are represented as mean ± SD. CD4+ depletion was significant by the end of the serial passage (two‐tailed Student's t‐test, p < .0001)
