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. 2017 Nov 21;14:227. doi: 10.1186/s12985-017-0890-6

Fig. 3.

Fig. 3

Detection of anti-PCV2 antibodies. Serum samples were collected on days 0, 1, 3, 5, 7, 14, 21 and 28, respectively, and anti-PCV2 antibodies determined by ELISA. The horizontal line represents cut off value for assay