According to the NSA, National Safety Council, there are more than 12 million motor vehicle accidents a year involving more than 20 million vehicles. This includes over 5 million non-fatal accidents annually. Approximately 2 million have disabling injuries of which approximately 1 million are work-related injuries.

The NHTSA, National Highway Traffic Safety Administration, in 1990 reported that about 28 percent of occupants involved in motor vehicle accidents incur minor to moderate injuries. About 6 percent incur severe to fatal injuries. 

A study, published in the European Spine Journal, found that between the first and second years following a motor vehicle accident over 20 percent of the people have their symptoms get worse.

About 10 percent of all motor vehicle accident victims become disabled.

Symptoms that arise from injuries in a motor vehicle accidents were once thought to present immediately following the accident. New research and clinical experience shows that a delay of symptoms seems to be the normal. Delayed symptom onset does not remove the possibility of severe injury.