virus (1) substitution (1) protéine (1) anticorps (1) animal (1) infection (1) gène (1) ADN (1) comparaison (1) Comparison (1) Inoculation (1) Viral proteins (1) Genes (1) Vaccination (1) Usage (1) Tetracycline (1) Swine (1) Infection (1) Immunoglobulins (1) Immunization (1) Immune response (1) Gene expression (1) Expression (1) Discrimination (1) DNA (1) Cells (1) Usage (1)