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Kinetics of ASFV titres. (A) Blood stored at 4 °C (DP sand, WB empty, humus and sand); (B) spleen stored at −20 °C for 24 months (DP1, WB1) or at −20 °C until month 18, and at 4 °C during months 18–21 (WB2); (C) bone marrow from a bone stored at −20 °C in an empty box (DP empty); (D) muscle stored at −20 °C (DP sand, WB humus) and at 4 °C (WB sand). Individual data points represent mean values (± SD) from two independent titrations.
