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. 2006 Mar 23;115(1):43–53. doi: 10.1016/j.vetmic.2006.02.008

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Fig. 5 — Immunofluorescence assay—human rectal tumour (HRT-18) cells infected with CRCoV (UK isolate 4182). (A) ELISA negative serum, (B) and (C) ELISA positive serum.