FIG. 1.

Antiviral activity of suIFN-α subtypes. (A, B) Antiviral activity in MDBK cells. Results are expressed as log₁₀-transformed percentage of PRV copies (100% = 2), calculated with respect to the copy number obtained in untreated samples (PRV-infected cells in MEM without suIFN-α subtypes). Data are log₁₀-transformed values and shown as mean ± 1 standard deviation. *P value < 0.05, **P < 0.01, and ***P < 0.001 with respect to mock supernatant. IFN, interferon; MEM, minimum essential medium; PRV, pseudorabies virus; MDBK, Madin–Darby bovine kidney.