Virus yields at 24 h p.i. were determined in Vero cells treated with CDM as follows: i) for 2 h prior to interferon induction and then removed, ii) added simultaneously with IFN and remained only for 16 h before infection, iii) added after virus infection and remained to virus harvest, iiii) added with IFN 16 h before infection, re-added after infection and remained to virus harvest. This evidence concerns the gene IFNA1 and infection.