||Stray SJ, Air GM. Apoptosis by influenza viruses correlates with efficiency of viral mRNA synthesis. Virus Res. 2001 Sep77(1):3-17. section 3.7 p.13 left column 2nd paragraphPubMed ID11451482
||The ability of each virus to cause cells to undergo programmed cell death (apoptosis) was measured by assaying DNA ends generated by apoptosis using terminal deoxynucleotidyl transferase to incorporate fluorescent nucleotide analogues at DNA breaks (TUNEL assay).
NWS-G70c mutant viruses