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Daily monitoring of rectal temperature of all the pigs post challenge. The clinical threshold for “fever” in the NADC30-like strain and HP-PRRSV strain was set at 40 and 41 °C, respectively. Vac/ChA: Vaccinated + Challenged TJ strain; Unvac/ChA: Challenged TJ strain; Vac/ChB: Vaccinated + Challenged HN 201605 strain; Unvac/ChB: Challenged HN 201605 strain; Mock: challenged with the same dose of PBS.
