Earlier quoted context omitted.
You're being downvoted but the point is valid. To say that this was built in two days is to completely ignore the near decade of investment into mrna vaccines. Total nonsense.
That's not relevant. The point is that Moderna had a low-latency solution when the moment showed itself. It isn't that it's easy. It offers some thinking that their technology is revolutionary and that perhaps we need to revisit our calculations to see if the risk/reward means we should attempt earlier roll out. We know, this time with hindsight, that it would have saved hundreds of thousands of lives and billions of…
you still need to make sure the vaccine actually works in trials and has no severe side effects. It takes one, and only one minor vaccine scandal to completely blow the trust of the public in public health.
There is no linear risk/reward when it comes to vaccines. You need to be incredibly confident that they are safe or else you're going to screw yourself possibly for decades.