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Boa constrictors had persistently high viral loads in all tissues. Viral RNA (vRNA) levels were quantified by qRT-PCR. (A) Blood viral RNA levels. (B and C) Tissue viral RNA levels for snake G (B) and snake H (C). Samples from the uninfected boa constrictor were negative. w.p.i., weeks postinfection; S2 and L2, viral genome segment genotypes.
