IRF4 and infection: Viral latency transcripts were highly enriched in Bla+ data sets of both M2.Stop and WT MHV68 (Fig. 6c), however, only AID+Bla+ samples from WT MHV68 infection showed increased transcription of Il10 and Irf4 (Fig. 6d), which is consistent with previous work demonstrating that M2 upregulates their expression26,86.