If you are referring to why he was paralysed, he got caisson's disease.
Decompression sickness (DCS) is the medical condition also called divers' disease, the bends, or caisson disease.
Since addison's disease has no direct cause, it cannot be prevented.
Most forms of periodontal disease can be prevented with good dental hygiene
No it can not.
Because Crohns disease has not been fully researched as to the causes, it cannot be prevented. Once diagnosed, the disease can be managed but never cured.
the typhoid disease is prevented with a vaccine called typhoid vaccine
Unfortunately, Hodgkin disease cannot be prevented. However, there is evidence that consuming alcohol (beer, wine or spirits) in moderation reduces the risk of developing the disease.
poliomyelits
No.
Yes it can. If you are not born with it.
There is no known prevention since the disease is secondary to an accident.