There is no brace position because you will not have warning of a car crash. Think about it. If there was warning, why would there be a crash? The driver would use the warning to avoid the crash. Unlike a pilot who must land the plane eventually regardless of conditions, a car driver can simply stop the car and get out.
If, under some hard-to-imagine ...
In short, the answer (regarding diseases) is yes.
Anytime you deal with blood or other bodily fluid, you risk catching a variety of diseases. The risk is compounded if you are not wearing proper protective equipment, washing your hands after handling them and covering breaks in skin before handling. Here is a list of the diseases you could end up with as ...
The effect of reclined seats on mortality in motor vehicle collisions.
The reclined position is associated with increased occupant mortality
in motor vehicle collisions.
flexion and compression injuries over pretensioned lap and shoulder
belts resulted in severe thoracoabdominal and spine injuries in
restrained occupants, with a high ...
TL;DR: Yes, but it's extremely rare and I could only find one example.
Has there ever been a medically verified case of someone having a big part of their body paralyzed for years, due to a car accident or similar event, who eventually recovered the normal functioning of their paralyzed body part?
It's very rare but I did find one example: