If I had to pick, I like Russia’s best from the description of its mechanism — but for all I know China’s is safer than all of ours but less efficacious?
I actually find all the approaches interesting.
I said a long time ago that mRna technology may turn out the be the greatest advance in medical history. Or not. We do not have enough data. I am not extremely confident of the current approach from what I understand.
The Russian approach using “alien” dna which is how the adendovirus can be described is well understood, but there are limitations of using human adenoviral vectors which would make me reluctant in case I ever “really” need something which uses these vectors.
It will be interesting to watch the large ongoing phase 3 trials for all of these.