The nucleic acid molecule of claim 22 or 25, wherein the MRE corresponds to miRNA selected from the group consisting of miR-16, miR-17, miR-19, miR-25, miR-34, miR-92, miR-93, miR-222, miR-149, miR-1977, miR-181b-2, miR-1259, and miR-1978. The nucleic acid molecule of claim 22, wherein the influenza virus coding sequence encodes an influenza virus protein selected from the group consisting of PBl, PB2, PA, Ml, M2, NP, NSl , and NS2/NEP. An isolated nucleic acid molecule comprising an influenza virus coding sequence and an artificial 3' untranslated region (3' UTR) comprising one or more microRNA Response Element (MRE) sequences inserted between the stop codon of the transcript and the polyadenylation site.