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Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
RT-qPCR was used to detect the titer of SVV in feces (A) and oral swabs (B) of Min pigs and Landrace pigs. The X-axis represents the number of days of SVV infection. The Y-axis represents the cycle threshold (Ct) value of RT-qPCR in feces (A) and mouth (B).