It's right that we can be aware it happens but it is such a rare complication that worrying about it is totally pointless.
Flu kills many people and in some has lasting complications, most of us don't but it makes sense to be careful around flu and be aware of the risks even though they are rare.
It is right that we are aware being in a car can lead to a crash which can kill us - so most of us stick more or less to speed limits, wear seatbelts and watch out for other traffic. We don't refuse to go in a car.
We are aware electricity can cause fires and burns so most of us are careful around electricity and check when we plug things in that the flex is not damaged. Still there are many electrical fires a year that cause death. We need to be aware and careful. We don't need to live our lives in fear.