Virus titers in blood samples (e.g., a-00015-2), obtained from pigs that were infected with either 102 (A and B), 103 (D and E), or 104 (G) HAD50 ASFV-G-Δ9GL and challenged (time of challenge indicated by arrows) at either 21 dpi (A and D) or 28 dpi (B and E). Also shown are viremia titers in pigs infected with either 102 (C), 103 (F), or 104 (H) HAD50 ASFV-G. Values are expressed as log10 HAD50 per milliliter. The sensitivity of virus detection was ≥log10 1.8 HAD50/ml. Numbers with the “a-” prefix are animal identification numbers.