[est31]

Note that even if a vaccine/drug/etc. gets approval, people are still looking for side effects. The approval process is designed to catch and document such side effects, but only once you give it to millions of people you find out about the side effects that are more rare. Also, due to the extremely sped up approval process, you know only little about any long term side effects.

Ideally you spread the doses over a few weeks or months so that you can stop the vaccinations should any issues arise. I'm not saying the current distribution is fine, it's far too slow. But not even Israel has vaccinated everyone in a single day, nor would that be a god idea.

This is btw also the way Google play distributes updates. Instead of every user getting the update right away, they first give it to a small group, then that group increases gradually in numbers.