The possibility that a vaccine that has not shown any serious sideeffects until now will disable 20% of people getting it is extremely low. And you make the typ

The possibility that a vaccine that has not shown any serious sideeffects until now will disable 20% of people getting it is extremely low. And you make the typical mistake of forgetting to weight vaccine risks against the risks of not vaccinating. Is this possible that a yet completely unknown sideeffect that hasn't shown up until now will suddenly appear? Yes. Is it likely? No, absolutely not. Is it possible that a mutated strain of Covid-19 will disable 20% of medical personel? Yes. Is it likely? No. But still: It's much more likely than a vaccine that has not shown any serious adverse events until now doing this.