https://www.medpagetoday.com/special-reports/exclusives/9160...
> Adenoviruses -- even as they occur in nature -- just do not have the capacity to alter DNA. Unlike retroviruses such as HIV or lentiviruses, wild-type adenoviruses do not carry the enzymatic machinery necessary for integration into the host cell's DNA. That's exactly what makes them good vaccine platforms for infectious diseases, according to Coughlan.
> And, engineered adenoviruses used in vaccines have been further crippled by deleting chunks of their genome so that they cannot replicate, further increasing their safety.