So I thought that too, when you say, "traditional..." Such as a deactivated polio virus being part of your polio vaccine. However, the Janssen J&J shot is, "replication-incompetent human adenovirus" - not a corona virus or COVID-19 virus. I think the virus is used as the means to gain entry to the cell, but the end result is that the cell is then generating the SARS-CoV-2 spike (S) antigen exactly as if you had been injected with Moderna. A virus works by entering a cell and causing the cell to replicate virus through the introduction of RNA into the cell by the virus (or other means depending on the virus). The part which is left out of J&J and AZ is whether the adenovirus has been engineered to deliver the same nucleoside-modified messenger RNA (modRNA) contained in the mRNA alternatives. My suspicion is that this is exactly the same which is evidenced by the overlap of these key phrases between the different vendors.
Moderna causes expression of "SARS-CoV-2 S antigen" <-- mRNA J&J causes expression of "SARS-CoV-2 spike (S) antigen" <-- viral vector
AZ, which is also viral vector does not have the word, "RNA," in their label. However, the AZ hints at this with, "vector encoding the S glycoprotein of SARS-CoV-2." You will note that the italicized part is the exact phrase which Pfizer uses in their description of the protein which is caused to be expressed in their shot.
AZ and Pfizer describe the protein expressed word-for-word the same way. J&J and Moderna describe the protein expressed in nearly the same way Moderna and Pfizer describe the RNA molecule word-for-word the same way.
So where I'm going is that they're all the same. Exactly. Maybe different dosing, maybe different efficiency in uptake of the nucleoside-modified messenger RNA (modRNA), but it appears to me that they are all using nucleoside-modified messenger RNA (modRNA). I'm trying to confirm that.
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