explanade
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- May 10, 2008
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Neither AstraZenica nor J&J are "old school". Obviously Pfizer and Moderna are not old school. All 4 are made with genetic engineering techniques that load the recipe for some portion of the spike protein into "a thing", then that thing utilizes the machinery of your living human cells to manufacture spikes. Bits of those spikes are presented on the surface of the cell, and that triggers immune response. So J&J might have got lucky or smart and picked genetic sequences that are a better match for the variants, but it works the same way as the rest. The "thing" (vector) is in two cases, a lipid nano particle, and in the other two cases, a genetically engineered adenovirus. The vector, dose size and regimen, will cause differences, but these 4 are all pretty similar in that they expect the cell's machinery to build spikes. Novavax isn't available yet, but that one is different...it builds the spikes in the factory. And the killed virus types, which are true "old school", also, the spikes are built outside the body, in culture.
Old school to me would be cuddling up with a bat with a fever hoping you get inoculated. Kind of like milk maids and cow pox.
All the COVID-19 vaccines are most definitely new world and the future of our medicine. And of course, this freaks out people like my sister and older cousin who sent me all kinds of crap links about why I should never get a COVID vaccine. I never even watched a second of them, just trashed the texts.
Old school vaccines would be those using a weakened or inactivated virus to provoke an immune response.
One of the Chinese vaccines use this method but it takes longer to manufacture.
I did read that one theory is that the adenovirus vectors such as J&J may produce a longer immune response than the mRNA but we don't know that yet.