Toni
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That's not how chickenpox re-emerges as shingles.
https://www.mayoclinic.org/diseases-conditions/shingles/symptoms-causes/syc-20353054
Your link is mostly correct; Whether Barbos is too, depends on what he means by 'embeds itself in the genome'. Varicella (VZV) latency is characterised by the presence of episomal plasmids in axons; These aren't a part of the nuclear genome, and are not incorporated into the chromosomes, but they are DNA (rather than RNA). I would certainly hesitate to characterise this as 'embedding itself in the genome'.
It's now been determined that VZV latency is strictly Axonal, rather than being characteristic of satellite cells as implied by your link (and as was understood to be the case for a long time for sound clinical reasons, and which would have implied replication as part of routine mitosis - which would require closer involvement in the nuclear genome). PCR and laser-capture microdissection has definitively determined that the VZV episome in fact resides directly within ganglionic neurons during latency, rather than being incorporated into the DNA of nearby cells. (Eshleman, Shahzad and Cohrs, Future Virol. 2011 Mar; 6(3): 341–355)
TL;DR you are right, and he is out of date.
Yeah, my link was Mayo Clinic. Mayo Clinic is right.