Yes- traditional vaccines are dead pieces of viral protein.
Your body identifies them as foreign, and makes antibodies.
Why not this path?
A really tough question...
It was tried on other related coronavirus and failed. (Mers &sars)
Coronavirus is likely to cause ADE. Antibody-dependent enhancement.
This effectively is fatal for someone that is vaccinated- that is then exposed to the virus in the wild.
Perhaps this mechanism reduces the chances for ADE, my speculation.
Also - these vaccines have “other new ingredients” that increase uncertainty.
Bottom line- I don’t know why this approach is being taken, but it is dangerous, in my opinion.
This adenovirus gene therapy approach is turned down by people with severe genetic disease, due to the risk. (hemoglobin mutation) See B thalassemia.
Thanks for the response. It is appreciated.