Each symbol type represents an individual mouse (n = 4). (B, C) RhIV viremia (log10 RNA copies/ml of plasma, upper rows) and blood CD4+ T-cell proportion (% of CD3+ cells, lower rows) in A1Ifnar+/+ mice (B) and A1Ifnar-/- mice (C) following infection with RhIVDu156, RhIVBG505, and RhIVSF162 on days, 0, 42 and 91, respectively. This evidence concerns the gene CD4 and infection.