Figure 2From: Pathogenesis and antigenic characterization of a new East European subtype 3 porcine reproductive and respiratory syndrome virus isolateVirus titres in sera of pigs at different days post-inoculation with PRRSV (Lena) and PRRSV (Belgium A). Symbols represent mean titres, whiskers above and below are standard deviations. Titres lower than 101.0TCID50/ml were considered to be negative. *The difference is significant between virus titres.Back to article page