> The closest ones to this are probably vector vaccines like the AZ one, because they use a "relatively" well-known delivery technique (as in: one that was at l

> The closest ones to this are probably vector vaccines like the AZ one, because they use a "relatively" well-known delivery technique (as in: one that was at least already used for a single market-ready vaccine before the Covid-19 ones). For that reason, AZ has several production partnerships around the world already, for example with the Serum Institute of India, and the AZ vaccine is considered the likely "workhorse" for global immunization because of this relative ease of manufacturing (and storage, of course). AFAIK the Serum Institute wasn't manufacturing any vector based vaccines prior to the Oxford/AZ vaccine, despite being the largest vaccine manufacturer in the world. They put in $100 Million of their own money to adapt to the AZ pipeline & scale it up.