We have previously observed that viral transcripts comprise about 20% of the total mRNA in PIV5-infected cells [57], a number that is consistent with all of the viral mRNA being of Cap0 structure, although we cannot formally exclude a small fraction being of Cap1/2 structure; however, since there is no increase in the ratio of Cap1 mRNAs beginning with A residues upon infection, we think this is unlikely. The gene discussed is CAP1; the disease is infection.