Phylogenetic analysis of partial ORF1 sequence. Phylogenetic tree was constructed on the MEGA4 software using the neighbor-joining method from a Kimura 2-parameter distance matrix based on partial nucleotide sequences of ORF1 encoding for RdRp, as previously described (4). Bootstrap values obtained from 500 resamplings are shown. A 100% homology is observed between blood donor sequences obtained from 2 aliquots of the same donation (DON sample 1 and sample 2) and recipient’s sequences (REC1 and REC2) obtained from 2 different samples. GenBank reference sequences are indicated by their accession number.