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Figure 1.
Time course of virus titres (A, D), IPMA antibody titres (B, E) and virus-neutralizing antibody titres (C, F) in sera of PRRSV-infected pigs (A, B, C) and PRV Begonia-infected pigs (D, E, F). Full symbols represent individual pig values (■ pig 1, ● pig 2, ▲ pig 3, ♦ pig 4, 
pig 5). Full lines represent average values of the pigs.