> Plasmid for HIV-1 reverse transcriptase expression: pCMV-dR8.2 dvpr was a gift from
189 Bob Weinberg (Addgene plasmid # 8455 ; http://n2t.net/addgene:8455 ;
> SARS-CoV-2 RNA can be reverse-transcribed and integrated into the human genome in cells overexpressing a reverse transcriptase
It's not my area, so I'm not sure, but I think that they added too much reverse transcriptase in an unrealistic concentration. (They are using a reverse transcriptase, that is an important enzyme for HIV, but it's not present in coronavirus and is not present in the vaccine.)
I think it's not totally impossible that the mRNA is copied to the ADN of the cell, it's just an unrealistic scenario to be worried about.