What about the issue of testing for safety? Before today, that took 5+ years.
That makes me nervous as well. I'd like a Covid vaccine, but I'd like to see a few tens of millions of people take it first. Especially since I (small town, WFH, kids in virtual school) have a much less risky situation wrt Covid.
Here's a twitter thread about that. Basically, most of that 5+ years is usually spent waiting around for funding and/or decisions from management.