Every bit of data showed a significant spike in serious infection in the week after vaccination. Every country experienced it. The data was overwhelming. All that was necessary was to ask people to self-isolate for 10 days after vaccination. After months of lockdowns, that wouldn’t be a big deal. To make an analogy with regular childhood vaccinations that pro-COVID-vaxxers so love, you are always told to take it easy the first few days after vaccination. Stay home, drink a lot of liquids, watch out for a bit of a fever. And it’s fine, everybody is used to it.
But it wasn’t done. To the contrary, some politicians insisted that people should go out in public immediately after vaccination. And this was never reversed. Many people were needlessly exposed to all sort of bad shit.