1 in 5000 injured by the vaccine. At least?

This data from Germany suggests there may have been 1 serious adverse reaction for every 5000 people injected.

Horrifying. How many thousands/millions of people have been injured/disabled, perhaps for life, because they got a jab they never needed? 

At the very least, why didn’t authorities check first for naturally-acquired immunity?

What will the cumulative number of injuries be after years of booster shots? 

...

or maybe 1 in 800?!