All authors contributed to the design of the experiments, to the scientific discussion and to the writing of the paper. YL, MG and IRG performed the laboratory work.
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Supplementary figure 1. Colocalization of PRRSV (red), caspase-3 (green) and nuclear DNA (blue) in PAM cultured with three PRRSV1 isolates for 24 hours at a MOI of 0.1.